Difference between revisions of "Incest" - New World Encyclopedia

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{{FamilyLaw}}
 
{{FamilyLaw}}
 
 
 
 
'''Incest''' is [[sexual activity]] between [[family]] members who would be forbidden (either legally or socially) to [[marry]]. <ref>''Kinship, Incest, and the Dictates of Law,'' by Henry A. Kelly, 14 Am. J. Juris. 69</ref> Incest constitutes a cultural [[taboo]] in most current nations and many past societies.<ref>''Incest: The Nature and Origin of the Taboo,'' by Emile Durkheim (tr.1963)</ref>  In many areas, incest is also prohibited by [[law]].  
 
'''Incest''' is [[sexual activity]] between [[family]] members who would be forbidden (either legally or socially) to [[marry]]. <ref>''Kinship, Incest, and the Dictates of Law,'' by Henry A. Kelly, 14 Am. J. Juris. 69</ref> Incest constitutes a cultural [[taboo]] in most current nations and many past societies.<ref>''Incest: The Nature and Origin of the Taboo,'' by Emile Durkheim (tr.1963)</ref>  In many areas, incest is also prohibited by [[law]].  
  
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The term ''incest'' can include sexual activity between family members of any [[gender]] and can include family members of any age.  When one of the family members involved is a [[minor]], incestuous activity has also been called ''intrafamilial child sexual abuse''. <ref>''Child Sexual Abuse and the State,'' by Ruby Andrew, UC Davis Law Review, vol. 39, 2006.</ref>
 
The term ''incest'' can include sexual activity between family members of any [[gender]] and can include family members of any age.  When one of the family members involved is a [[minor]], incestuous activity has also been called ''intrafamilial child sexual abuse''. <ref>''Child Sexual Abuse and the State,'' by Ruby Andrew, UC Davis Law Review, vol. 39, 2006.</ref>
  
==[[Inbreeding]] among animals==
+
==History==
In some species, most notably [[bonobo]]s, sexual activity, including that between closely related individuals, is a means of [[dispute resolution]] or [[greeting]].
+
It is relatively accepted that incestuous marriages were widespread at least during the Graeco-Roman period of Egyptian history. Numerous [[papyrus|papyri]] and the Roman census declarations attest to many husbands and wives as being brother and sister (Lewis 1983, Bagnall and Frier 1994, Shaw 1993).  In (Hopkins 1980) this is conclusively demonstrated, and more recent scholars in the field have not questioned it. Some of these incestuous relationships were in the royal family, especially the [[Ptolemies]].
  
[[Inbreeding]] between close relatives, including parents and children, has been observed in some species, although patterns of parenting behavior and the structure of dominance hierarchies serve to discourage inbreeding. For example, offspring—sometimes only the male offspring—are often driven away by the mother about when they reach sexual maturity.
+
Incestuous unions were frowned upon and considered as ''nefas'' (against the laws of gods and man) in [[Roman Empire|Roman]] times, and were explicitly forbidden by an imperial edict in AD 295, which divided the concept of ''incestus'' into two categories of unequal gravity: the ''incestus iuris gentium'', who was applied to both Romans and non-Romans in the Empire, and the ''incestus iuris civilis'' which concerned only the Roman citizens. Therefore, for example, an Egyptian could marry an aunt, but a Roman could not. Despite the act of incest being unacceptable within the Roman Empire, Roman Emperor [[Caligula]] is rumored to have had open sexual relationships with all three of his sisters, ([[Julia Livilla]], [[Drusilla (sister of Caligula)|Drusilla]], and [[Agrippina the Younger]]) and to have killed his favorite (Drusilla) when she became pregnant with his child.
  
Inbreeding increases the frequency of [[Zygosity|homozygote]]s within a population. Depending on the size of the population and the number of generations in which inbreeding occurs, the increase of homozygotes has positive or negative effects.
+
It is interesting to note how customs have changed in the UK, with incest at one time apparently being normal practice, at least in the south of the country. When [[Julius Caesar]] invaded Britain for the second time in 54 B.C.E., he noted the customs of the Britons, remarking, 'Wives are shared between groups of ten or twelve men, especially between brothers and between fathers and sons; but the offspring of these unions are counted as the children of the man with whom a particular woman cohabited first.' <ref>England: The Autobiography, John Lewis-Stempel, Penguin, 2005.</ref>
 
 
==Distinctions between incest and inbreeding==
 
The concepts of incest and [[inbreeding]] are distinct. ''Incest'' describes socially taboo [[Human sexuality|sexual activity]] between individuals who are considered to be too closely related to enter into marriage. In other words, it is a social and cultural term.
 
 
 
''Inbreeding'' describes [[procreation]] between individuals with varying degrees of ''genetic'' closeness, regardless of their relative social positions. It is a scientific term, rather than a social or cultural term.
 
 
 
In many societies, the definition of incest and the degree of inbreeding may correlate positively. For example, sexual relations between people of a given degree of genetic closeness is considered incestuous. In other societies, the correlation may not be as obvious. Many cultures consider relationship between [[parallel cousin]]s incestuous, but not those between [[cross cousin]]s, although the degree of genetic relationship does not differ.  Relationships may be considered incestuous even when there is no genetic relationship at all: [[stepparent]]–stepchild relationships, and those between siblings-in-law, have been considered incestuous, even though they involve no risk of inbreeding above that of the marriage that relates them.
 
 
 
==Genetics==
 
[[Image:W.Clerke table.PNG|thumb|150px|Table of prohibited marriages from ''The Trial of Bastardie'' by William Clerke. London, 1594.]]
 
While the exact nature of kin-recognition psychology awaits definition, and while the degree to which it can be overcome by cultural forces is poorly understood, an overwhelming body of research now shows that evolutionary biology and evolved human psychology play a central role in human aversion to incest.
 
 
 
Inbreeding leads to an increase in [[Zygosity|homozygosity]] (the same allele at the same locus on both members of a chromosome pair). This occurs because close relatives are much more likely to share the same [[allele]]s than unrelated individuals. This is especially important for recessive alleles that happen to be [[deleterious]], which are harmless and inactive in a heterozygous pairing but, when homozygous, can cause serious developmental defects. Such offspring have a much higher chance of death before reaching the age of reproduction, leading to what biologists call ''[[inbreeding depression]]'', a measurable decrease in [[fitness (biology)|fitness]] due to inbreeding among populations with deleterious recessives. Recessive genes, which can contain various genetic problems, appear more often in the offspring of procreative couplings whose members both have the same gene. For example, the child of persons who are both [[hemophilia]]c has a 25% chance of having hemophilia.
 
 
 
Leavitt has argued that inbreeding in small populations can have long-term positive effects: "small inbreeding populations, while initially increasing their chances for harmful homozygotic recessive pairings on a locus, will quickly eliminate such genes from their breeding pools, thus reducing their genetic loads." (Leavitt 1990, p. 974.) However, other specialists have argued that these positive long-term effects of inbreeding are almost always unrealized because the short-term fitness depression is enough for selection to discourage it. In order for such a "purification" to work, the offspring of close mate pairings must be either homozygous-dominant (completely free of bad genes) or -recessive (will die before reproducing). If there are heterozygous offspring, they will be able to transmit the defective genes without themselves feeling any effects. This model does not account for multiple deleterious recessives (most people have more than one) and multi-locus gene linkages. The introduction of mutations negates the weeding out of bad genes, and evidence exists that homozygous individuals are often more at risk to [[pathogen]]ic predation. Because of these complications, it is extremely difficult to overcome the initial spike in fitness penalties incurred by inbreeding. (Moore 1992; Uhlmann 1992.)
 
 
 
==Psychology==
 
Presumably because of the genetic harm done, animals inbreed only in extremely unusual circumstances: major population bottlenecks and forced artificial selection by animal husbandry. Pusey & Worf (1996) and Penn & Potts (1999) both found evidence that some species possess evolved psychological aversions to inbreeding, via kin-recognition [[heuristic]]s.
 
 
 
[[Evolutionary psychologist]]s have argued that humans should possess similar psychological mechanisms. The [[Westermarck effect]], that children who are raised together during the first five to ten years of life have inhibited sexual desire toward one another, is one strong piece of evidence in favor of this. In what is now a key study of the Westermarck hypothesis, the [[anthropology|anthropologist]] [[Melford E. Spiro]] demonstrated that inbreeding aversion between siblings is predictably linked to co-residency. In a [[cohort (statistics)|cohort]] study of children raised [[commune (intentional community)|communally]] (as if siblings) in the [[Kiryat Yedidim]] [[kibbutz]] in the 1950s, Spiro found practically no intermarriage between his subjects as adults, despite positive pressure from parents and community. The social experience of having grown up ''as'' brothers and sisters created an incest aversion, even though the children were genetically unrelated.
 
 
 
Further studies have supported the hypothesis that some psychological mechanisms cause children who grow up together to lack sexual attraction to one another. Spiro's study is corroborated by Fox (1962), who found similar results in Israeli kibbutzum. Wolf and Huang (1980) reported similar aversions in Taiwanese "child marriages," in which the future wife was brought into the family and raised with her fiancé. Such marriages were notoriously difficult to consummate and led to decreased fertility of the marriage. Lieberman ''et al.'' (2003) found that childhood co-residency with an opposite-sex sibling (biologically related or not) was significantly correlated with moral repugnance toward third-party sibling incest. [http://www.psych.ucsb.edu/research/cep/papers/incest2003.pdf]
 
 
 
It is not unusual for biological siblings who did not know each other in childhood to be attracted to each other when meeting as adults (''see'' [[genetic sexual attraction]]).
 
 
 
==Endogamy and exogamy==
 
[[Anthropology|Anthropologists]] have found that [[marriage]] is governed, though often informally, by rules of [[exogamy]] (marriage between members of different groups) and [[endogamy]] (marriage between members of the same group). The definition of a group for purposes of exogamy or endogamy varies considerably between societies. In most stratified societies, one must marry outside of one's [[nuclear family]]—a form of exogamy—but is encouraged to marry a member of one's own [[Social class|class]], [[race]], or [[religion]]—a form of endogamy. In this example, the exogamous group is small and the endogamous group is large. But, in some societies, the exogamous group and endogamous group may be of equal size, as in societies divided into [[clans]] or [[lineages]]. 
 
 
 
In most such societies, membership in a clan or lineage is inherited through only one parent. Sex with a member of one's own clan or lineage—whether a parent or a genetically very distant relative—is considered incestuous, whereas sex with a member of another clan or lineage—including the other parent—is not be considered incest (although it may be considered wrong for other reasons).
 
 
 
For example, [[Trobriand Islands|Trobriand Islanders]] prohibit both sexual relations between a man and his mother and those between a woman and her father, but they describe these prohibitions in very different ways: relations between a man and his mother fall within the category of forbidden relations among members of the same clan; relations between a woman and her father do not. This is because the Trobrianders are [[matrilineal]]; children belong to the clan of their mother and not of their father. Thus, sexual relations between a man and his mother's sister (and mother's sister's daughter) are also considered incestuous, but relations between a man and his father's sister are not. Indeed, a man and his father's sister will often have a flirtatious relationship, and a man and the daughter of his father's sister may prefer to have sexual relations or marry. Anthropologists have hypothesized that, in these societies, the incest taboo reinforces the rule of exogamy, and thus ensures that social ties between clans or lineages will be maintained through intermarriage.
 
 
 
Chinese and Indian societies have very broad notions of the exogamous group: relations between individuals with the same surname may be banned.{{Fact|date=February 2007}}
 
 
 
Some cultures include relatives by marriage in incest prohibitions; these relationships are called [[Affinity (law)|affinity]] rather than [[consanguinity]]. For example, the question of the legality and morality of a widower who wished to marry his [[Deceased Wife's Sister's Marriage Act 1907|deceased wife's sister]] was the subject of long and fierce debate in the [[United Kingdom]] in the 19th century, involving, among others, [[Matthew Boulton]]. In medieval Europe, standing as a [[godparent]] to a child also created a bond of affinity.
 
  
 
==Forms of incest==
 
==Forms of incest==
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===Sibling incest between children===
 
===Sibling incest between children===
 
+
Consensual incest between similar-age brothers and sisters is not uncommon, according to a study by [[Floyd Martinson]], who found that 10-15% of college students had childhood sexual experiences with a brother or sister. However only 5-10% of those included intercourse; and therefore most probably represent a form of [[child sexuality]].<ref>[http://www.ethicaltreatment.org/research.htm CHILD AND ADOLESCENT SEXUALITY] Ethical Treatment for All Youth. Retrieved July 16, 2007.</ref>
Consensual incest between similar-age brothers and sisters is not uncommon, according to a study by [[Floyd Martinson]], who found that 10-15% of college students had childhood sexual experiences with a brother or sister.<ref>[http://www.ethicaltreatment.org/research.htm CHILD AND ADOLESCENT SEXUALITY]</ref> However only 5-10% of those included intercourse; and therefore most probably represent a form of [[child sexuality]].{{Fact|date=March 2007}}
 
  
 
===Sexual relations between cousins and other distant relatives===
 
===Sexual relations between cousins and other distant relatives===
 
 
 
[[Image:Map of USA with Incest Legality.svg|thumb|250px|Map of the legality of marriage to first cousins in the [[USA]].]]
 
[[Image:Map of USA with Incest Legality.svg|thumb|250px|Map of the legality of marriage to first cousins in the [[USA]].]]
 
 
In most of the Western world, while ''incest'' generally describes forbidden sexual relations within the family, the applicable definitions of family vary. Within the United States, marriage between first cousins is illegal in some states, but not in others, and sociologists have classified marriage laws in the United States into two categories: one in which the definitions of incest are taken from the Bible, which frowns upon marriage within one's lineage but less so on one's blood relatives; and one that frowns more on marriage between blood relatives (such as cousins), but less on that within one's lineage.
 
In most of the Western world, while ''incest'' generally describes forbidden sexual relations within the family, the applicable definitions of family vary. Within the United States, marriage between first cousins is illegal in some states, but not in others, and sociologists have classified marriage laws in the United States into two categories: one in which the definitions of incest are taken from the Bible, which frowns upon marriage within one's lineage but less so on one's blood relatives; and one that frowns more on marriage between blood relatives (such as cousins), but less on that within one's lineage.
  
 
Twenty-four states prohibit marriages between first cousins, and another seven permit them only under special circumstances. [[Utah]], for example, permits first cousins to marry only if both spouses are over age 65, or at least 55 with evidence of sterility; [[North Carolina]] permits first cousins to marry unless they are "double first cousins" (cousins through more than one line); [[Maine]] permits first cousins to marry only upon presentation of a certificate of genetic counseling. The other states with some, but not absolute, limits on first-cousin marriage are [[Arizona]], [[Illinois]], [[Indiana]], and [[Wisconsin]].
 
Twenty-four states prohibit marriages between first cousins, and another seven permit them only under special circumstances. [[Utah]], for example, permits first cousins to marry only if both spouses are over age 65, or at least 55 with evidence of sterility; [[North Carolina]] permits first cousins to marry unless they are "double first cousins" (cousins through more than one line); [[Maine]] permits first cousins to marry only upon presentation of a certificate of genetic counseling. The other states with some, but not absolute, limits on first-cousin marriage are [[Arizona]], [[Illinois]], [[Indiana]], and [[Wisconsin]].
 
First-cousin marriage without restriction is permitted in nineteen states—[[Alabama]], [[Alaska]], [[California]], [[Colorado]], [[Connecticut]], [[Florida]], [[Georgia (U.S. state)|Georgia]], [[Hawaii]], [[Maryland]], [[Massachusetts]], [[New Jersey]], [[New Mexico]], [[New York]], [[Rhode Island]], [[South Carolina]], [[Tennessee]], [[Vermont]], and [[Virginia]]—and the [[District of Columbia]].
 
 
First-cousin marriage is illegal in [[Arkansas]], [[Delaware]], [[Idaho]], [[Iowa]], [[Kansas]], [[Kentucky]], [[Louisiana]], [[Michigan]], [[Minnesota]], [[Mississippi]], [[Missouri]], [[Montana]], [[Nebraska]], [[Nevada]], [[New Hampshire]], [[North Dakota]], [[Ohio]], [[Oklahoma]], [[Oregon]], [[Pennsylvania]], [[South Dakota]], [[Texas]] (such marriages may not be performed after 1 September 2005, although previous marriages are still recognized), [[Washington]], [[West Virginia]], and [[Wyoming]], although the [[United States Constitution]] has been interpreted as requiring these states to give "[[Full Faith and Credit Clause|full faith and credit]]" to such marriages performed in other states. {{Fact|date=April 2007}} Yet, in the absence of a [[United States Supreme Court]] ruling, the scope of the Full Faith and Credit Clause is not clear in this context, especially as it would have implications on whether states were required to recognize marriages commenced in Massachusetts between same-sex couples. There are conflicts and courts have interpreted the clause differently. Some states, such as Wisconsin [http://nxt.legis.state.wi.us/nxt/gateway.dll?f=templates&fn=default.htm&vid=WI:Default&d=stats&jd=ch.%20765], have [[marriage abroad]] laws that make marriages by their residents in jurisdictions in order to circumvent their state's marriage restrictions null and void, and marriages contracted in that state to avoid restrictions in another jurisdiction likewise void.
 
  
 
==Laws regarding incest==
 
==Laws regarding incest==
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=== Adult incest ===
 
=== Adult incest ===
Incestuous relations between adults, such as between an adult brother and sister, are illegal in most parts of the industrialized world {{Fact|date=February 2007}} {{Specify|date=February 2007}} <!--Which parts? Where are they legal and where are they illegal? And what about the "non-industrialized world," are they more frequently legal there?—> These laws are sometimes questioned on the grounds that such relations do not harm other people (provided the couple have no children) and so should not be criminalized.  Proposals have been made from time to time to repeal these laws — for example, the proposal by the Australian Model Criminal Code Officer's Committee discussion paper "Sexual Offenses against the Person" released in November 1996. (This particular proposal was later withdrawn by the committee due to a large public outcry. Defenders of the proposal argue that the outcry was mostly based on the mistaken belief that the committee was intending to legalize sexual relations between parents and their minor children.)
+
Incestuous relations between adults, such as between an adult brother and sister, are illegal in most parts of the industrialized world. These laws are sometimes questioned on the grounds that such relations do not harm other people (provided the couple have no children) and so should not be criminalized.  Proposals have been made from time to time to repeal these laws — for example, the proposal by the Australian Model Criminal Code Officer's Committee discussion paper "Sexual Offenses against the Person" released in November 1996. (This particular proposal was later withdrawn by the committee due to a large public outcry. Defenders of the proposal argue that the outcry was mostly based on the mistaken belief that the committee was intending to legalize sexual relations between parents and their minor children.)
  
 
In the wake of the ''[[Lawrence v. Texas]]'' (539 U.S. 558 2003) decision by the U.S. Supreme Court, striking down laws criminalizing homosexual sodomy as unconstitutional, some have argued that by the same logic laws against consensual adult incest should be unconstitutional. Some civil libertarians argue that all private sexual activity between consenting adults should be legal, and its criminalization is a violation of human rights. In ''[[Muth v. Frank]]'' (412 F.3d 808), the [[7th Cir.|7th U.S. Circuit Court of Appeals]] interpreted the case applying to homosexual activity, and refused to draw this conclusion from ''Lawrence'', however — a decision that attracted mixed opinions. The [[Supreme Court of the United States|Supreme Court]] refused to hear this case.
 
In the wake of the ''[[Lawrence v. Texas]]'' (539 U.S. 558 2003) decision by the U.S. Supreme Court, striking down laws criminalizing homosexual sodomy as unconstitutional, some have argued that by the same logic laws against consensual adult incest should be unconstitutional. Some civil libertarians argue that all private sexual activity between consenting adults should be legal, and its criminalization is a violation of human rights. In ''[[Muth v. Frank]]'' (412 F.3d 808), the [[7th Cir.|7th U.S. Circuit Court of Appeals]] interpreted the case applying to homosexual activity, and refused to draw this conclusion from ''Lawrence'', however — a decision that attracted mixed opinions. The [[Supreme Court of the United States|Supreme Court]] refused to hear this case.
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In February 2007 a German brother and sister, Patrick Stübing and Susan Karolewski,<ref>http://www.berlingske.dk/udland/artikel:aid=870966</ref> called for the country's incest laws to be abolished so that they could continue their sexual relationship. Although they were born into the same family, Patrick was not living with them when Susan was born and they met for the first time in 2000.  Between 2002 and 2006 they had four children although three have been taken into foster care.  Two of the children have disabilities and while it is possible that these were caused by inbreeding, premature birth may also have contributed.<ref>{{cite web|url=http://news.sky.com/skynews/article/0,,30200-1253397,00.html|title=Sky News "Challenge To Incest Laws"}}</ref> The siblings' lawyer, Endrik Wilhelm, has lodged an appeal with Germany's highest judicial body, the Federal Constitutional Court in Karlsruhe, in order to overturn the country's ban on incest, suffering the misconception that the law prevented anything but the mental and physical disabilities equaling negligent [[bodily harm]] due to the inbreeding.<ref> {{cite web|url=http://news.bbc.co.uk/2/hi/europe/6424937.stm|title=BBC News "Couple Stand by Forbidden Love"}}</ref>
 
In February 2007 a German brother and sister, Patrick Stübing and Susan Karolewski,<ref>http://www.berlingske.dk/udland/artikel:aid=870966</ref> called for the country's incest laws to be abolished so that they could continue their sexual relationship. Although they were born into the same family, Patrick was not living with them when Susan was born and they met for the first time in 2000.  Between 2002 and 2006 they had four children although three have been taken into foster care.  Two of the children have disabilities and while it is possible that these were caused by inbreeding, premature birth may also have contributed.<ref>{{cite web|url=http://news.sky.com/skynews/article/0,,30200-1253397,00.html|title=Sky News "Challenge To Incest Laws"}}</ref> The siblings' lawyer, Endrik Wilhelm, has lodged an appeal with Germany's highest judicial body, the Federal Constitutional Court in Karlsruhe, in order to overturn the country's ban on incest, suffering the misconception that the law prevented anything but the mental and physical disabilities equaling negligent [[bodily harm]] due to the inbreeding.<ref> {{cite web|url=http://news.bbc.co.uk/2/hi/europe/6424937.stm|title=BBC News "Couple Stand by Forbidden Love"}}</ref>
  
==History==
+
==Scientific Views==
===Ancient civilizations===
+
===[[Inbreeding]] among animals===
It is relatively accepted that incestuous marriages were widespread at least during the Graeco-Roman period of Egyptian history. Numerous [[papyrus|papyri]] and the Roman census declarations attest to many husbands and wives as being brother and sister (Lewis 1983, Bagnall and Frier 1994, Shaw 1993).  In (Hopkins 1980) this is conclusively demonstrated, and more recent scholars in the field have not questioned it. Some of these incestuous relationships were in the royal family, especially the [[Ptolemies]].
+
In some species, most notably [[bonobo]]s, sexual activity, including that between closely related individuals, is a means of [[dispute resolution]] or [[greeting]].
  
Incestuous unions were frowned upon and considered as ''nefas'' (against the laws of gods and man) in [[Roman Empire|Roman]] times, and were explicitly forbidden by an imperial edict in AD 295, which divided the concept of ''incestus'' into two categories of unequal gravity: the ''incestus iuris gentium'', who was applied to both Romans and non-Romans in the Empire, and the ''incestus iuris civilis'' which concerned only the Roman citizens. Therefore, for example, an Egyptian could marry an aunt, but a Roman could not. Despite the act of incest being unacceptable within the Roman Empire, Roman Emperor [[Caligula]] is rumored to have had open sexual relationships with all three of his sisters, ([[Julia Livilla]], [[Drusilla (sister of Caligula)|Drusilla]], and [[Agrippina the Younger]]) and to have killed his favorite (Drusilla) when she became pregnant with his child.
+
[[Inbreeding]] between close relatives, including parents and children, has been observed in some species, although patterns of parenting behavior and the structure of dominance hierarchies serve to discourage inbreeding. For example, offspring—sometimes only the male offspring—are often driven away by the mother about when they reach sexual maturity.
  
It is interesting to note how customs have changed in the UK, with incest at one time apparently being normal practice, at least in the south of the country. When [[Julius Caesar]] invaded Britain for the second time in 54 B.C.E., he noted the customs of the Britons, remarking, 'Wives are shared between groups of ten or twelve men, especially between brothers and between fathers and sons; but the offspring of these unions are counted as the children of the man with whom a particular woman cohabited first.' <ref>England: The Autobiography, John Lewis-Stempel, Penguin, 2005.</ref>
+
Inbreeding increases the frequency of [[Zygosity|homozygote]]s within a population. Depending on the size of the population and the number of generations in which inbreeding occurs, the increase of homozygotes has positive or negative effects.
  
==Religious views on incest==
+
==Distinctions between incest and inbreeding==
===Biblical references===
+
The concepts of incest and [[inbreeding]] are distinct. ''Incest'' describes socially taboo [[Human sexuality|sexual activity]] between individuals who are considered to be too closely related to enter into marriage. In other words, it is a social and cultural term.
  
 +
''Inbreeding'' describes [[procreation]] between individuals with varying degrees of ''genetic'' closeness, regardless of their relative social positions. It is a scientific term, rather than a social or cultural term.
  
The [[Book of Leviticus]] in the [[Bible]] lists prohibitions against sexual relations between various pairs of family members. Father and daughter, mother and son, and other pairs are forbidden, on pain of death, to have sexual relations. (Father–daughter incest is covered by a prohibition on sexual relationships between a man and any daughter born to any woman he has had sexual relationships with, thereby prohibiting his incest not only with his own daughters but also with women who could not possibly be his daughters by blood.) It prohibits sexual relations between [[aunt]]s and [[Cousin|nephew]]s, but not between [[uncle]]s and nieces. [[Christians]] interpret it to include the latter by implication, though [[Jews]] traditionally do not.
+
In many societies, the definition of incest and the degree of inbreeding may correlate positively. For example, sexual relations between people of a given degree of genetic closeness is considered incestuous. In other societies, the correlation may not be as obvious. Many cultures consider relationship between [[parallel cousin]]s incestuous, but not those between [[cross cousin]]s, although the degree of genetic relationship does not differ. Relationships may be considered incestuous even when there is no genetic relationship at all: [[stepparent]]–stepchild relationships, and those between siblings-in-law, have been considered incestuous, even though they involve no risk of inbreeding above that of the marriage that relates them.
  
===Islam===
+
===Genetics===
The [[Quran|Qur'an]] mentions incest in the [[Sura]]t [[An-Nisa]], which prohibits a man from having sexual relationships with his mother, daughter, sister, paternal aunt, maternal aunt, and niece. Relations with [[wet nurse]]s are also prohibited. But on the other side, Islam allows marriage with cousins and other more distant relatives. Only in case of marriage does Islam allow sexual relations between cousins and other distant relatives.
+
[[Image:W.Clerke table.PNG|thumb|150px|Table of prohibited marriages from ''The Trial of Bastardie'' by William Clerke. London, 1594.]]
 +
While the exact nature of kin-recognition psychology awaits definition, and while the degree to which it can be overcome by cultural forces is poorly understood, an overwhelming body of research now shows that evolutionary biology and evolved human psychology play a central role in human aversion to incest.
  
===Hindu opposition===
+
Inbreeding leads to an increase in [[Zygosity|homozygosity]] (the same allele at the same locus on both members of a chromosome pair). This occurs because close relatives are much more likely to share the same [[allele]]s than unrelated individuals. This is especially important for recessive alleles that happen to be [[deleterious]], which are harmless and inactive in a heterozygous pairing but, when homozygous, can cause serious developmental defects. Such offspring have a much higher chance of death before reaching the age of reproduction, leading to what biologists call ''[[inbreeding depression]]'', a measurable decrease in [[fitness (biology)|fitness]] due to inbreeding among populations with deleterious recessives. Recessive genes, which can contain various genetic problems, appear more often in the offspring of procreative couplings whose members both have the same gene. For example, the child of persons who are both [[hemophilia]]c has a 25% chance of having hemophilia.
Hinduism speaks of incest in highly abhorrent terms. Hindus were greatly fearful of the bad effects of incest and thus practice to date strict rules of both [[endogamy]] and[[ exogamy]], that is, marriage in the same caste (''varna'') but not in the same family tree (''gotra'') or bloodline (''Parivara'').
 
  
==Folklore==
+
Leavitt has argued that inbreeding in small populations can have long-term positive effects: "small inbreeding populations, while initially increasing their chances for harmful homozygotic recessive pairings on a locus, will quickly eliminate such genes from their breeding pools, thus reducing their genetic loads." (Leavitt 1990, p. 974.) However, other specialists have argued that these positive long-term effects of inbreeding are almost always unrealized because the short-term fitness depression is enough for selection to discourage it. In order for such a "purification" to work, the offspring of close mate pairings must be either homozygous-dominant (completely free of bad genes) or -recessive (will die before reproducing). If there are heterozygous offspring, they will be able to transmit the defective genes without themselves feeling any effects. This model does not account for multiple deleterious recessives (most people have more than one) and multi-locus gene linkages. The introduction of mutations negates the weeding out of bad genes, and evidence exists that homozygous individuals are often more at risk to [[pathogen]]ic predation. Because of these complications, it is extremely difficult to overcome the initial spike in fitness penalties incurred by inbreeding.  (Moore 1992; Uhlmann 1992.)
'''Incest in folklore''' is found in many cultures.
 
  
In [[Greek mythology]], [[Zeus]] and [[Hera]] were brother and sister as well as husband and wife.  They were the children of [[Cronus]] and [[Rhea (mythology)|Rhea]] (also married siblings). Cronus and Rhea, in turn, were children of [[Uranus (mythology)|Uranus]] and [[Gaia (mythology)|Gaia]] (a son who took his mother as consort, in some versions of the myth).  Cronus and Rhea's siblings, the other [[Titan (mythology)|Titans]], were all also married siblings.
+
==Social Scientific Views==
 +
===Psychology===
 +
Presumably because of the genetic harm done, animals inbreed only in extremely unusual circumstances: major population bottlenecks and forced artificial selection by animal husbandry. Pusey & Worf (1996) and Penn & Potts (1999) both found evidence that some species possess evolved psychological aversions to inbreeding, via kin-recognition [[heuristic]]s.
  
[[Sophocles]]' tragic play ''[[Oedipus the King]]'' features the ancient Greek king inadvertently [[consummation|consummating]] an incestuous relationship with his mother.  
+
[[Evolutionary psychologist]]s have argued that humans should possess similar psychological mechanisms. The [[Westermarck effect]], that children who are raised together during the first five to ten years of life have inhibited sexual desire toward one another, is one strong piece of evidence in favor of this. In what is now a key study of the Westermarck hypothesis, the [[anthropology|anthropologist]] [[Melford E. Spiro]] demonstrated that inbreeding aversion between siblings is predictably linked to co-residency. In a [[cohort (statistics)|cohort]] study of children raised [[commune (intentional community)|communally]] (as if siblings) in the [[Kiryat Yedidim]] [[kibbutz]] in the 1950s, Spiro found practically no intermarriage between his subjects as adults, despite positive pressure from parents and community. The social experience of having grown up ''as'' brothers and sisters created an incest aversion, even though the children were genetically unrelated.
  
In [[Norse mythology]], [[Loki]] accuses [[Freyr]] and [[Freyja]] of committing incest, in ''[[Lokasenna]]''. He also says that [[Njörðr]] had Freyr with his sister. This is also indicated in the ''[[Ynglinga saga]]'' which says that incest was legal among the [[Vanir]].
+
Further studies have supported the hypothesis that some psychological mechanisms cause children who grow up together to lack sexual attraction to one another. Spiro's study is corroborated by Fox (1962), who found similar results in Israeli kibbutzum. Wolf and Huang (1980) reported similar aversions in Taiwanese "child marriages," in which the future wife was brought into the family and raised with her fiancé. Such marriages were notoriously difficult to consummate and led to decreased fertility of the marriage. Lieberman ''et al.'' (2003) found that childhood co-residency with an opposite-sex sibling (biologically related or not) was significantly correlated with moral repugnance toward third-party sibling incest. [http://www.psych.ucsb.edu/research/cep/papers/incest2003.pdf]
  
In [[Chinese mythology]], [[Fu Xi]] was a god-king who took his sister [[Nüwa]] as his bride.
+
It is not unusual for biological siblings who did not know each other in childhood to be attracted to each other when meeting as adults (''see'' [[genetic sexual attraction]]).
  
In [[Icelandic folklore]] a common plot involves a brother and sister (illegally) conceiving a child. They subsequently escape justice by moving to a remote valley. There they proceed to have several more children. The man has some magical abilities which he uses to direct travelers to or away from the valley as he chooses. The siblings always have exactly one daughter but any number of sons. Eventually the magician allows a young man (usually searching for sheep) into the valley and asks him to marry the daughter and give himself and his sister a civilized burial upon their deaths. This is subsequently done.
+
===Endogamy and exogamy===
 +
[[Anthropology|Anthropologists]] have found that [[marriage]] is governed, though often informally, by rules of [[exogamy]] (marriage between members of different groups) and [[endogamy]] (marriage between members of the same group). The definition of a group for purposes of exogamy or endogamy varies considerably between societies. In most stratified societies, one must marry outside of one's [[nuclear family]]—a form of exogamy—but is encouraged to marry a member of one's own [[Social class|class]], [[race]], or [[religion]]—a form of endogamy. In this example, the exogamous group is small and the endogamous group is large. But, in some societies, the exogamous group and endogamous group may be of equal size, as in societies divided into [[clans]] or [[lineages]].
  
In Norse legends, the hero [[Sigmund]] and his sister [[Signy]] murdered her children and begot a son, [[Sinfjötli]]. When Sinfjötli had grown up, he and Sigmund murdered Signy's husband [[Siggeir]]. The element of incest also appears in the version of the story used in [[Richard Wagner|Wagner]]'s opera-cycle ''[[Der Ring des Nibelungen]]'', in which [[Siegfried]] is the offspring of [[Siegmund]] and his sister [[Sieglinde]].
+
In most such societies, membership in a clan or lineage is inherited through only one parent. Sex with a member of one's own clan or lineage—whether a parent or a genetically very distant relative—is considered incestuous, whereas sex with a member of another clan or lineage—including the other parent—is not be considered incest (although it may be considered wrong for other reasons).
  
The [[legendary Danish kings|legendary Danish king]] [[Hrólfr kraki]] was born from an incestuous union of [[Halga|Helgi]] and [[Yrsa]].
+
For example, [[Trobriand Islands|Trobriand Islanders]] prohibit both sexual relations between a man and his mother and those between a woman and her father, but they describe these prohibitions in very different ways: relations between a man and his mother fall within the category of forbidden relations among members of the same clan; relations between a woman and her father do not. This is because the Trobrianders are [[matrilineal]]; children belong to the clan of their mother and not of their father. Thus, sexual relations between a man and his mother's sister (and mother's sister's daughter) are also considered incestuous, but relations between a man and his father's sister are not. Indeed, a man and his father's sister will often have a flirtatious relationship, and a man and the daughter of his father's sister may prefer to have sexual relations or marry. Anthropologists have hypothesized that, in these societies, the incest taboo reinforces the rule of exogamy, and thus ensures that social ties between clans or lineages will be maintained through intermarriage.
  
One tragic tale from the [[Kalevala]] (the [[Finland|Finnish]] national epic) is that of [[Kullervo]], a warrior-magician who unknowingly meets and seduces his long-lost sister on his travels.
+
Chinese and Indian societies have very broad notions of the exogamous group: relations between individuals with the same surname may be banned.{{Fact|date=February 2007}}
  
In some versions of the medieval [[Great Britain|British]] legend of [[King Arthur]], Arthur accidentally begats a son by his sister Morgause in a night of blind lust, then seeks to have the child killed when he hears of a prophecy that it will bring about the undoing of the [[Knights of the Round Table|Round Table]]. The child survives and later becomes [[Mordred]], his ultimate nemesis.
+
Some cultures include relatives by marriage in incest prohibitions; these relationships are called [[Affinity (law)|affinity]] rather than [[consanguinity]]. For example, the question of the legality and morality of a widower who wished to marry his [[Deceased Wife's Sister's Marriage Act 1907|deceased wife's sister]] was the subject of long and fierce debate in the [[United Kingdom]] in the 19th century, involving, among others, [[Matthew Boulton]]. In medieval Europe, standing as a [[godparent]] to a child also created a bond of affinity.
  
In [[Sri Lanka]]n folklore, there are at least three significant instances where incest is mentioned. The forefather of the [[Sinhalese people|Sinhala]] race, "Sinhabahu," is a king who married his own sister "Sinhaseevali." Incest is again mentioned when King Vijaya's son and daughter fled to the jungle together in protest of their father's second marriage. Also, the brother "Dantha" and the sister "Hemamalini" who brought the sacred tooth relic of Lord Buddha to the island, seemed to also have a married relationship. Despite the liberal mentioning of incest in folklore, Sri Lankan culture regards incest as a taboo. Then again, contemporary Sri Lankan culture is heavily influenced by the cultures of former colonial rulers, during the last couple of centuries.
+
==Religious views on incest==
 
+
===Biblical references===
In fairy tales of [[Aarne-Thompson]] folktale type 510B, the persecuted heroine, the heroine is persecuted by her father, and most usually, the persecution is an attempt to marry her, as in ''[[Allerleirauh]]'' or ''[[Donkeyskin]]''.  This was taken up into the legend of Saint [[Dymphna]].
+
The [[Book of Leviticus]] in the [[Bible]] lists prohibitions against sexual relations between various pairs of family members. Father and daughter, mother and son, and other pairs are forbidden, on pain of death, to have sexual relations. (Father–daughter incest is covered by a prohibition on sexual relationships between a man and any daughter born to any woman he has had sexual relationships with, thereby prohibiting his incest not only with his own daughters but also with women who could not possibly be his daughters by blood.) It prohibits sexual relations between [[aunt]]s and [[Cousin|nephew]]s, but not between [[uncle]]s and nieces. [[Christians]] interpret it to include the latter by implication, though [[Jews]] traditionally do not.
 
 
Several [[Child Ballads]] have the motif of incest between brothers and sisters who are raised apart.  This is usually unwitting (as in the ''[[The Bonny Hind]]'' and ''[[Sheath and Knife]]'', for example), but always brings about a tragic end.
 
 
 
In ancient Vietnamese folklore, there is a tale of a brother and a sister. As children, the brother and sister fought over a toy. The brother smashes a stone over his sister's head, and the girl falls down unconscious. The boy thinks he has killed his sister, and afraid of punishment, he flees. Years later, by coincidence, they meet again, fall in love, and marry without knowing they are siblings. They build a house along a seashore, and the brother becomes a fisherman while his sister tends to the house. Together they have a son. One day, the brother discovers a scar on his wife's head. She tells him about the childhood fight with her brother, and the brother realizes that he has married his own sister. Overwhelmed with guilt over his incest, the brother goes out on the sea. Every day, the sister climbs to the top of the hill to look for her brother, but he never comes back. She died in waiting and became "Hon Vong Phu" ("the stone waiting for her husband").
 
 
 
 
 
 
 
 
 
==Popular culture==
 
 
 
[[Incest]] is a somewhat popular topic in English [[erotic fiction]]; there are entire collections and websites devoted solely to this genre, with an entire genre of pornographic [[pulp fiction]] known as "incest novels." This is probably because, as with many other fetishes, the taboo nature of the act adds to the titillation. With the advent of the Internet, there is even more of this type of fiction available.
 
 
 
Besides this, incest is sometimes mentioned or described in mainstream, non-erotic fiction. Connotations can be negative, very rarely positive, or neutral.
 
 
 
 
 
For example, in [[Gabriel García Márquez]]'s ''[[One Hundred Years of Solitude]]'' there are several cases of sex between more or less close relatives, including that which occurs between a nephew and aunt. Other works of literature show consequences not so grave, such as the [[V.C. Andrews]] novel ''[[Flowers in the Attic]]'' and its subsequent sequels, in which brother and sister uphold a loving relationship; [[Arundhati Roy]]'s ''[[The God of Small Things]]'', in which fraternal twins share a cathartic sexual experience; and several of [[Robert A. Heinlein]]'s later stories.
 
 
 
Incest is a major element of the [[Sophocles]] play ''[[Oedipus the King]]'', based on the story from [[Greek mythology]], in which the [[title character]] unknowingly kills his father and marries his mother.  This act came to great prominence in the 20th century with [[Freud]]'s analysis of the [[Oedipus complex]] as lying beneath the psychology of all men.  Its female counterpart is called the [[Electra complex]].
 
 
 
Incest is a frequent theme in the work of V. C. Andrews; in addition to the [[Flowers in the Attic]] series, the Culver series, starting with the book ''Dawn'', features a character abducted at birth, who later discovers that her new boyfriend is really her brother.  Her brother obsesses over her and at one point rapes her. Elsewhere in the series, it is revealed that Dawn's father is really her half-brother, and that the woman she had believed to be her grandmother was raped as a teenager by her own father, resulting in the birth of a child.
 
 
 
Incest also appears in [[John Milton]]'s "[[Paradise Lost]]" in which Satan commits incest with his daughter Sin and their child, Death, after terrible childbirth, proceeds to rape his mother.
 
 
 
[[Vladimir Nabokov]]'s novel ''[[Ada or Ardor: A Family Chronicle]]'' deals very heavily with the incestuous relationships in the intricate family tree of the main character Van Veen.  There are explicit moments of sexual relations primarily between Van and his sister Ada, as well as between Ada and her younger sister Lucette.  Nabokov does not necessarily deal with any complexities or consequences, social or otherwise, which may be inherent to incestuous relationships—outside of the strictly practical concerns of having to hide the taboo relationships from others.  Incest in ''Ada'' seems mainly to be a sexual manifestation of the characters' intellectual incestuousness, and operates on a similar plane as do other instances of "sexual transgression"  in Nabokov's novels of this period, such as [[pedophilia]] in ''[[Lolita]]'' and [[homosexuality]] in ''[[Pale Fire]]''.
 
 
 
In [[William Shakespeare]]'s ''[[Hamlet]]'', the King of Denmark, [[Claudius]], married his brother's widow [[Gertrude]], which implied their sexual relationships.
 
 
 
Incest plays an influential role in [[George R. R. Martin]]'s bestselling fantasy series ''[[A Song of Ice and Fire]]''. In the series, incest is illegal and seen as abnormal; however, children born from incestuous parents (brother and sister, father and daughter) are healthy and no different from children born from non-incestuous parents, although one of them is extremely [[sadistic personality disorder|sadistic]]. Two of the main characters, a queen and her brother, practice incest in secret, which leads to a major war across the land when it is discovered that their illegitimate children (not the King's) have inherited the throne. Their public denials of the incest and their secret love for each other causes a great deal of tension and conflict in the series.
 
 
 
In [[J. R. R. Tolkien]]'s ''[[The Children of Húrin]]'' (and the earlier ''[[Silmarillion]]''), the characters [[Túrin]] and [[Nienor]], who are brother and sister, unwittingly enter into an incestuous marriage when they meet for the first time while Nienor is suffering from amnesia.
 
 
 
In the comic series [[Planetary]] by [[Warren Ellis]] and [[John Cassaday]], [[Doc Brass]] was a the result of a eugenics experiment that went all the way back to the [[french revolution]]. In issue #5 'the good doctor' it is revealed that his parents were siblings.
 
 
 
In two books of [[Philippa Gregory]]'s Wideacre Trilogy, [[Wideacre]] and [[The Favored Child]], the central female characters Beatrice and Julia have intercourse with their brothers Harry and Richard, respectively.
 
 
 
In [[Richard Wagner]]'s [[Der Ring des Nibelungen|Ring]], the hero [[Siegfried]] is the son of the incestuous relationship between [[Sigmund|Siegmund]] and [[Signy|Sieglinde]].
 
 
 
[[Thomas Mann]]'s ''[[The Holy Sinner]]'' explores the spiritual consequences of unintentional incest. His short story "The Blood of the Walsungs" also depicts brother-sister incest, drawing explicitly on Wagner's Siegmund and Sieglinde.
 
 
 
It also played a minor role in Stephanie Lauren's 12th Cynster novel "The Truth About Love," where the villains in the story were the Fritham siblings, Jordan and Eleanor, who often trysted in Hellabore Hall's Garden of Night. They murdered the heroine's mother Miribelle, purely because she heard and witnessed them in the Garden of Night (which was directly under the balcony of the Hall), and thus tried to prevent her daughter Jacqueline from ever consorting with the Fritham siblings again, creating a huge problem for Jordan, who had plotted to gain Hellabore Hall through a marriage with Jacqueline.
 
 
 
Another book where incest plays a minor role is [[Robert Cormier]]'s [[Fade (novel)]]. The main character, a teenage boy named Paul Moreaux, has the ability to disappear or 'fade' from sight. He uses the 'fade' to spy on two new friends, twins Emerson and his sister Page Winslow, and is shocked to witness an incestuous encounter between the two.
 
 
 
Doris Lessing's short story, Each Other, in the anthology, "A Man and Two Women" (Granada 1965) features the incestuous relationship between Fred and Freda, adult brother and sister and each in another relationship.
 
 
 
A depiction of an incestuous world in [[science fiction]] can be found in [[Theodore Sturgeon]]'s story "[[If All Men Were Brothers Would You Let One Marry Your Sister?]]."
 
 
 
One young adult novel of note is [[Francesca Lia Block]]'s [[Wasteland (novel)]], which features the incestuous relationship of a teenage brother and sister. Another is [[Sonya Hartnett]]'s [[Sleeping Dogs]], in which a brother and sister's incest is only one symptom of the family's degradation.
 
 
 
In "A Little Demonstration of Affection," a sensitive YA novel by Elizabeth Winthrop, teenage siblings Jenny and Charley struggle with their growing attraction to each other.
 
 
 
Another book featuring brother-sister incest is [[Judith Krantz]]'s book "[[Princess Daisy (novel)|Princess Daisy]]." It contains some rather graphic scenes of Daisy being raped by her half-brother Ram.
 
 
 
In [[Penelope Lively]]'s book [[Moon Tiger]] the main character Claudia Hampton reveals to the reader that she had an incestuous relationship with her brother Gordon while both were in their late teens.
 
 
 
In [[Ian McEwan]]'s novel "[[The Cement Garden]]," the tension between the protagonist Jack and his older sister Julie culminates in incest. Also, [[Donna Tartt]]'s [[The Secret History]] contains incest between the twins Charles and Camilla, which is not revealed until the final chapters of the book.
 
 
 
At the end of [[A.S. Byatt]]'s novela [[Morpho Eugenia]], a Victorian naturalist - recently married into an aristocratic family - discovers the ongoing affair between his languid, alluring wife and her brother.  
 
 
 
The [[intersexed]] narrator of [[Jeffrey Eugenides]]' "[[Middlesex]]" traces his condition to a rare recessive gene which he inherited from his grandparents, a brother and sister who fled Greece for Detroit, Michigan when the Turkish army invaded in 1922.
 
 
 
[[Pauline Melville]]'s ''The Ventriloquist's Tale'' explores the impact of European colonization on the Amerindians of [[Guyana]] through the affair of a pair of half-Scottish, half-Guyanese siblings at the time of a [[solar eclipse]].
 
 
 
In the [[Elenium]] trilogy by [[David Eddings]], [[Queen Ehlana]]'s widowed father Aldreas carried on an incestuous affair with his sister, Princess Arissa.  She had initially seduced him in their youth with the intent of getting him to marry her, as one of the advisors had found an obscure law which would permit it, but was thwarted by the hero's father.  The affair resumed after the death of Ehlana's mother and continued until the King's death, at which time Arissa was confined to a convent.
 
 
 
[[Helen Dunmore]]'s ''A Spell of Winter'' centers around the story of orphans Catherine and Rob Allen, who grow up in the bleak, desolate environment of their grandfather's country manor and whose relationship eventually becomes a sexual one.
 
 
 
Teresa, the troubled protagonist of [[Alice Hoffman]]'s ''White Horses'', idolizes her brother Silver, and only after several incestuous episodes and a lifetime of disappointment does she discover that all along she has only been in love with the man she thought he was.
 
 
 
In the [[Alan Moore]] graphic novel [[Lost Girls]], incest plays a prominent part in the retelling of the story of [[Wendy Darling]] and her brothers from [[Peter Pan]].
 
  
 +
===Islam===
 +
The [[Quran|Qur'an]] mentions incest in the [[Sura]]t [[An-Nisa]], which prohibits a man from having sexual relationships with his mother, daughter, sister, paternal aunt, maternal aunt, and niece. Relations with [[wet nurse]]s are also prohibited. But on the other side, Islam allows marriage with cousins and other more distant relatives. Only in case of marriage does Islam allow sexual relations between cousins and other distant relatives.
  
 +
===Hindu opposition===
 +
Hinduism speaks of incest in highly abhorrent terms. Hindus were greatly fearful of the bad effects of incest and thus practice to date strict rules of both [[endogamy]] and[[ exogamy]], that is, marriage in the same caste (''varna'') but not in the same family tree (''gotra'') or bloodline (''Parivara'').
  
 
== Notes ==
 
== Notes ==
Line 251: Line 142:
  
 
==External links==
 
==External links==
===Support organizations for survivors===
 
<!-- Please do not add more links to support organisations. If you would like to change this, discuss on the talk page first. Thank you. —>
 
====National organizations====
 
 
*[http://www.rainn.org RAINN Rape, Abuse, and Incest National Network] National, toll-free hotline for victims of sexual assault: '''1-800-656-HOPE'''
 
*[http://www.rainn.org RAINN Rape, Abuse, and Incest National Network] National, toll-free hotline for victims of sexual assault: '''1-800-656-HOPE'''
 
====Support organizations====
 
 
*[http://www.aftersilence.org After Silence], online support group, message board and chat room for survivors of rape, incest and sexual abuse.
 
*[http://www.aftersilence.org After Silence], online support group, message board and chat room for survivors of rape, incest and sexual abuse.
*[http://www.pandys.org/ Pandora's Aquarium], online support group, message board, and chat room for survivors of sexual violence, including incest, and their supporters.
 
*[http://www.voices-action.org/ VOICES in Action] Victims Of Incest Can Emerge Survivors, an international organization providing assistance to adult and adolescent victims of child sexual abuse and trauma.
 
*[http://theawarenesscenter.org The Awareness Center, Inc.] The Jewish Coalition Against Sexual Abuse/Assault (JCASA)
 
*[http://www.mdsa-online.org Making Daughters Safe Again] Online resources for mother-daughter incest survivors.
 
*[http://www.sasian.org/ SASIAN] Sibling Abuse Survivors Information and Advocacy Networ
 
*[http://siawso.memberlodge.org/ SIA Survivors of Incest Anonymous] World Service Office, Inc. links many independent SIA 12-step support groups around the world.
 
 
===Published articles===
 
 
*[http://papers.ssrn.com/sol3/papers.cfm?abstract_id=904100 Child Sexual Abuse and the State]  by Ruby Andrew, ''UC Davis Law Review,'' vol. 39, 2006.  Discusses U.S. incest laws in cases where victim is a minor.
 
*[http://papers.ssrn.com/sol3/papers.cfm?abstract_id=904100 Child Sexual Abuse and the State]  by Ruby Andrew, ''UC Davis Law Review,'' vol. 39, 2006.  Discusses U.S. incest laws in cases where victim is a minor.
 
*[http://www.phoenixnewtimes.com/issues/2005-12-29/news/feature.html Forbidden Fruit]  by John Dougherty, ''Phoenix New Times,'' Dec. 29, 2005.  Intrafamilial child sexual abuse in Arizona-Utah polygamist community.
 
*[http://www.phoenixnewtimes.com/issues/2005-12-29/news/feature.html Forbidden Fruit]  by John Dougherty, ''Phoenix New Times,'' Dec. 29, 2005.  Intrafamilial child sexual abuse in Arizona-Utah polygamist community.
 
*[http://www.legalaffairs.org/issues/January-February-2005/feature_labi_janfeb05.msp The Gentle People]  by Nadya Labi, ''Legal Affairs,'' Jan. 2005.  Intrafamilial child sexual abuse in Amish community.
 
*[http://www.legalaffairs.org/issues/January-February-2005/feature_labi_janfeb05.msp The Gentle People]  by Nadya Labi, ''Legal Affairs,'' Jan. 2005.  Intrafamilial child sexual abuse in Amish community.
 
* [http://www.vachss.com/av_dispatches/nyt-11202005.html The Incest Loophole]  by Andrew Vachss, ''New York Times,'' Nov. 20, 2005.  Sentencing incest perpetrators when victim is a minor.
 
* [http://www.vachss.com/av_dispatches/nyt-11202005.html The Incest Loophole]  by Andrew Vachss, ''New York Times,'' Nov. 20, 2005.  Sentencing incest perpetrators when victim is a minor.
 
===Statistics===
 
 
*[http://www.icasa.org/uploads/adult_survivors_of_incest.pdf Adult Survivors of Incest], Illinois Coalition Against Sexual Assault (ICASA)
 
*[http://www.icasa.org/uploads/adult_survivors_of_incest.pdf Adult Survivors of Incest], Illinois Coalition Against Sexual Assault (ICASA)
 
 
 
 
 
  
 
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{{Credits|Incest|144579809|Incest_in_folklore|134634009|Incest_in_popular_culture|144056076|}}

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Incest

Incest is sexual activity between family members who would be forbidden (either legally or socially) to marry. [1] Incest constitutes a cultural taboo in most current nations and many past societies.[2] In many areas, incest is also prohibited by law.

Which family members constitute those covered by the incest prohibition is determined by the society in which the persons live. Some societies consider it to include only those related by birth or those who live in the same household; other societies further include those related by adoption, marriage, or clan. [3]

The term incest can include sexual activity between family members of any gender and can include family members of any age. When one of the family members involved is a minor, incestuous activity has also been called intrafamilial child sexual abuse. [4]

History

It is relatively accepted that incestuous marriages were widespread at least during the Graeco-Roman period of Egyptian history. Numerous papyri and the Roman census declarations attest to many husbands and wives as being brother and sister (Lewis 1983, Bagnall and Frier 1994, Shaw 1993). In (Hopkins 1980) this is conclusively demonstrated, and more recent scholars in the field have not questioned it. Some of these incestuous relationships were in the royal family, especially the Ptolemies.

Incestuous unions were frowned upon and considered as nefas (against the laws of gods and man) in Roman times, and were explicitly forbidden by an imperial edict in AD 295, which divided the concept of incestus into two categories of unequal gravity: the incestus iuris gentium, who was applied to both Romans and non-Romans in the Empire, and the incestus iuris civilis which concerned only the Roman citizens. Therefore, for example, an Egyptian could marry an aunt, but a Roman could not. Despite the act of incest being unacceptable within the Roman Empire, Roman Emperor Caligula is rumored to have had open sexual relationships with all three of his sisters, (Julia Livilla, Drusilla, and Agrippina the Younger) and to have killed his favorite (Drusilla) when she became pregnant with his child.

It is interesting to note how customs have changed in the UK, with incest at one time apparently being normal practice, at least in the south of the country. When Julius Caesar invaded Britain for the second time in 54 B.C.E., he noted the customs of the Britons, remarking, 'Wives are shared between groups of ten or twelve men, especially between brothers and between fathers and sons; but the offspring of these unions are counted as the children of the man with whom a particular woman cohabited first.' [5]

Forms of incest

Parental incest

Incest perpetrated by parents of either sex against children of either sex is generally considered a form of child abuse.

Sibling incest between children

Consensual incest between similar-age brothers and sisters is not uncommon, according to a study by Floyd Martinson, who found that 10-15% of college students had childhood sexual experiences with a brother or sister. However only 5-10% of those included intercourse; and therefore most probably represent a form of child sexuality.[6]

Sexual relations between cousins and other distant relatives

File:Map of USA with Incest Legality.svg
Map of the legality of marriage to first cousins in the USA.

In most of the Western world, while incest generally describes forbidden sexual relations within the family, the applicable definitions of family vary. Within the United States, marriage between first cousins is illegal in some states, but not in others, and sociologists have classified marriage laws in the United States into two categories: one in which the definitions of incest are taken from the Bible, which frowns upon marriage within one's lineage but less so on one's blood relatives; and one that frowns more on marriage between blood relatives (such as cousins), but less on that within one's lineage.

Twenty-four states prohibit marriages between first cousins, and another seven permit them only under special circumstances. Utah, for example, permits first cousins to marry only if both spouses are over age 65, or at least 55 with evidence of sterility; North Carolina permits first cousins to marry unless they are "double first cousins" (cousins through more than one line); Maine permits first cousins to marry only upon presentation of a certificate of genetic counseling. The other states with some, but not absolute, limits on first-cousin marriage are Arizona, Illinois, Indiana, and Wisconsin.

Laws regarding incest

Degrees of criminality

The laws of many U.S. states recognize two separate degrees of incest, the more serious being the closest blood relationships, such as father–daughter, mother–son, and brother–sister, with the less serious charge being pressed against more distantly related individuals who engage in sexual intercourse, usually to and including first cousins and sometimes half-cousins. In New York State, close-blood-relation incest is a felony with a maximum penalty of four years in prison, while the less serious charge is usually only a misdemeanor. Many incest laws do not expressly proscribe sexual conduct other than vaginal intercourse—such as oral sex—or any sexual activity between relatives of the same sex (though if either party is a minor, it may be punishable otherwise).

In Australia, incest is punishable by a maximum of 25 years imprisonment for the more serious form of penetrating one's offspring, even if that child is legally an adult, and 5 years for the less serious charge of sexual penetration of a sibling or half-sibling.

For many years, Andrew Vachss has written about the incest loophole in the laws of most U.S. states.

New York's law—much like that of most other states—allows the possibility of privileged treatment for a special class of offender: the perpetrator who is related to his prey. In other words, the penal code gives a discount to child rapists who grow their own victims. In New York, sex with a child under the age of 11 is a Class B felony, punishable by up to 25 years in prison. The law is indexed appropriately, in the chapter on sex offenses. If, however, the sexually abused child is closely related to the perpetrator, state law provides for radically more lenient treatment. In such cases, the prosecutor may choose to charge the same acts as incest. This is not listed as a sex offense, but instead as an "offense affecting the marital relationship," listed next to adultery in the law books. It is a Class E felony, for which even a convicted offender may be granted probation.

—Andrew Vachss, Op-Ed, The New York Times, 20 November 2005

The latter was repealed through legislative action in 2006; however, it remains in the law of many states. [7]

Adult incest

Incestuous relations between adults, such as between an adult brother and sister, are illegal in most parts of the industrialized world. These laws are sometimes questioned on the grounds that such relations do not harm other people (provided the couple have no children) and so should not be criminalized. Proposals have been made from time to time to repeal these laws — for example, the proposal by the Australian Model Criminal Code Officer's Committee discussion paper "Sexual Offenses against the Person" released in November 1996. (This particular proposal was later withdrawn by the committee due to a large public outcry. Defenders of the proposal argue that the outcry was mostly based on the mistaken belief that the committee was intending to legalize sexual relations between parents and their minor children.)

In the wake of the Lawrence v. Texas (539 U.S. 558 2003) decision by the U.S. Supreme Court, striking down laws criminalizing homosexual sodomy as unconstitutional, some have argued that by the same logic laws against consensual adult incest should be unconstitutional. Some civil libertarians argue that all private sexual activity between consenting adults should be legal, and its criminalization is a violation of human rights. In Muth v. Frank (412 F.3d 808), the 7th U.S. Circuit Court of Appeals interpreted the case applying to homosexual activity, and refused to draw this conclusion from Lawrence, however — a decision that attracted mixed opinions. The Supreme Court refused to hear this case.

In France, incest is not a crime. Incestuous relations between a parent and minor child are prohibited and punished by law, but not between adults.

In February 2007 a German brother and sister, Patrick Stübing and Susan Karolewski,[8] called for the country's incest laws to be abolished so that they could continue their sexual relationship. Although they were born into the same family, Patrick was not living with them when Susan was born and they met for the first time in 2000. Between 2002 and 2006 they had four children although three have been taken into foster care. Two of the children have disabilities and while it is possible that these were caused by inbreeding, premature birth may also have contributed.[9] The siblings' lawyer, Endrik Wilhelm, has lodged an appeal with Germany's highest judicial body, the Federal Constitutional Court in Karlsruhe, in order to overturn the country's ban on incest, suffering the misconception that the law prevented anything but the mental and physical disabilities equaling negligent bodily harm due to the inbreeding.[10]

Scientific Views

Inbreeding among animals

In some species, most notably bonobos, sexual activity, including that between closely related individuals, is a means of dispute resolution or greeting.

Inbreeding between close relatives, including parents and children, has been observed in some species, although patterns of parenting behavior and the structure of dominance hierarchies serve to discourage inbreeding. For example, offspring—sometimes only the male offspring—are often driven away by the mother about when they reach sexual maturity.

Inbreeding increases the frequency of homozygotes within a population. Depending on the size of the population and the number of generations in which inbreeding occurs, the increase of homozygotes has positive or negative effects.

Distinctions between incest and inbreeding

The concepts of incest and inbreeding are distinct. Incest describes socially taboo sexual activity between individuals who are considered to be too closely related to enter into marriage. In other words, it is a social and cultural term.

Inbreeding describes procreation between individuals with varying degrees of genetic closeness, regardless of their relative social positions. It is a scientific term, rather than a social or cultural term.

In many societies, the definition of incest and the degree of inbreeding may correlate positively. For example, sexual relations between people of a given degree of genetic closeness is considered incestuous. In other societies, the correlation may not be as obvious. Many cultures consider relationship between parallel cousins incestuous, but not those between cross cousins, although the degree of genetic relationship does not differ. Relationships may be considered incestuous even when there is no genetic relationship at all: stepparent–stepchild relationships, and those between siblings-in-law, have been considered incestuous, even though they involve no risk of inbreeding above that of the marriage that relates them.

Genetics

Table of prohibited marriages from The Trial of Bastardie by William Clerke. London, 1594.

While the exact nature of kin-recognition psychology awaits definition, and while the degree to which it can be overcome by cultural forces is poorly understood, an overwhelming body of research now shows that evolutionary biology and evolved human psychology play a central role in human aversion to incest.

Inbreeding leads to an increase in homozygosity (the same allele at the same locus on both members of a chromosome pair). This occurs because close relatives are much more likely to share the same alleles than unrelated individuals. This is especially important for recessive alleles that happen to be deleterious, which are harmless and inactive in a heterozygous pairing but, when homozygous, can cause serious developmental defects. Such offspring have a much higher chance of death before reaching the age of reproduction, leading to what biologists call inbreeding depression, a measurable decrease in fitness due to inbreeding among populations with deleterious recessives. Recessive genes, which can contain various genetic problems, appear more often in the offspring of procreative couplings whose members both have the same gene. For example, the child of persons who are both hemophiliac has a 25% chance of having hemophilia.

Leavitt has argued that inbreeding in small populations can have long-term positive effects: "small inbreeding populations, while initially increasing their chances for harmful homozygotic recessive pairings on a locus, will quickly eliminate such genes from their breeding pools, thus reducing their genetic loads." (Leavitt 1990, p. 974.) However, other specialists have argued that these positive long-term effects of inbreeding are almost always unrealized because the short-term fitness depression is enough for selection to discourage it. In order for such a "purification" to work, the offspring of close mate pairings must be either homozygous-dominant (completely free of bad genes) or -recessive (will die before reproducing). If there are heterozygous offspring, they will be able to transmit the defective genes without themselves feeling any effects. This model does not account for multiple deleterious recessives (most people have more than one) and multi-locus gene linkages. The introduction of mutations negates the weeding out of bad genes, and evidence exists that homozygous individuals are often more at risk to pathogenic predation. Because of these complications, it is extremely difficult to overcome the initial spike in fitness penalties incurred by inbreeding. (Moore 1992; Uhlmann 1992.)

Social Scientific Views

Psychology

Presumably because of the genetic harm done, animals inbreed only in extremely unusual circumstances: major population bottlenecks and forced artificial selection by animal husbandry. Pusey & Worf (1996) and Penn & Potts (1999) both found evidence that some species possess evolved psychological aversions to inbreeding, via kin-recognition heuristics.

Evolutionary psychologists have argued that humans should possess similar psychological mechanisms. The Westermarck effect, that children who are raised together during the first five to ten years of life have inhibited sexual desire toward one another, is one strong piece of evidence in favor of this. In what is now a key study of the Westermarck hypothesis, the anthropologist Melford E. Spiro demonstrated that inbreeding aversion between siblings is predictably linked to co-residency. In a cohort study of children raised communally (as if siblings) in the Kiryat Yedidim kibbutz in the 1950s, Spiro found practically no intermarriage between his subjects as adults, despite positive pressure from parents and community. The social experience of having grown up as brothers and sisters created an incest aversion, even though the children were genetically unrelated.

Further studies have supported the hypothesis that some psychological mechanisms cause children who grow up together to lack sexual attraction to one another. Spiro's study is corroborated by Fox (1962), who found similar results in Israeli kibbutzum. Wolf and Huang (1980) reported similar aversions in Taiwanese "child marriages," in which the future wife was brought into the family and raised with her fiancé. Such marriages were notoriously difficult to consummate and led to decreased fertility of the marriage. Lieberman et al. (2003) found that childhood co-residency with an opposite-sex sibling (biologically related or not) was significantly correlated with moral repugnance toward third-party sibling incest. [1]

It is not unusual for biological siblings who did not know each other in childhood to be attracted to each other when meeting as adults (see genetic sexual attraction).

Endogamy and exogamy

Anthropologists have found that marriage is governed, though often informally, by rules of exogamy (marriage between members of different groups) and endogamy (marriage between members of the same group). The definition of a group for purposes of exogamy or endogamy varies considerably between societies. In most stratified societies, one must marry outside of one's nuclear family—a form of exogamy—but is encouraged to marry a member of one's own class, race, or religion—a form of endogamy. In this example, the exogamous group is small and the endogamous group is large. But, in some societies, the exogamous group and endogamous group may be of equal size, as in societies divided into clans or lineages.

In most such societies, membership in a clan or lineage is inherited through only one parent. Sex with a member of one's own clan or lineage—whether a parent or a genetically very distant relative—is considered incestuous, whereas sex with a member of another clan or lineage—including the other parent—is not be considered incest (although it may be considered wrong for other reasons).

For example, Trobriand Islanders prohibit both sexual relations between a man and his mother and those between a woman and her father, but they describe these prohibitions in very different ways: relations between a man and his mother fall within the category of forbidden relations among members of the same clan; relations between a woman and her father do not. This is because the Trobrianders are matrilineal; children belong to the clan of their mother and not of their father. Thus, sexual relations between a man and his mother's sister (and mother's sister's daughter) are also considered incestuous, but relations between a man and his father's sister are not. Indeed, a man and his father's sister will often have a flirtatious relationship, and a man and the daughter of his father's sister may prefer to have sexual relations or marry. Anthropologists have hypothesized that, in these societies, the incest taboo reinforces the rule of exogamy, and thus ensures that social ties between clans or lineages will be maintained through intermarriage.

Chinese and Indian societies have very broad notions of the exogamous group: relations between individuals with the same surname may be banned.[citation needed]

Some cultures include relatives by marriage in incest prohibitions; these relationships are called affinity rather than consanguinity. For example, the question of the legality and morality of a widower who wished to marry his deceased wife's sister was the subject of long and fierce debate in the United Kingdom in the 19th century, involving, among others, Matthew Boulton. In medieval Europe, standing as a godparent to a child also created a bond of affinity.

Religious views on incest

Biblical references

The Book of Leviticus in the Bible lists prohibitions against sexual relations between various pairs of family members. Father and daughter, mother and son, and other pairs are forbidden, on pain of death, to have sexual relations. (Father–daughter incest is covered by a prohibition on sexual relationships between a man and any daughter born to any woman he has had sexual relationships with, thereby prohibiting his incest not only with his own daughters but also with women who could not possibly be his daughters by blood.) It prohibits sexual relations between aunts and nephews, but not between uncles and nieces. Christians interpret it to include the latter by implication, though Jews traditionally do not.

Islam

The Qur'an mentions incest in the Surat An-Nisa, which prohibits a man from having sexual relationships with his mother, daughter, sister, paternal aunt, maternal aunt, and niece. Relations with wet nurses are also prohibited. But on the other side, Islam allows marriage with cousins and other more distant relatives. Only in case of marriage does Islam allow sexual relations between cousins and other distant relatives.

Hindu opposition

Hinduism speaks of incest in highly abhorrent terms. Hindus were greatly fearful of the bad effects of incest and thus practice to date strict rules of both endogamy andexogamy, that is, marriage in the same caste (varna) but not in the same family tree (gotra) or bloodline (Parivara).

Notes

  1. Kinship, Incest, and the Dictates of Law, by Henry A. Kelly, 14 Am. J. Juris. 69
  2. Incest: The Nature and Origin of the Taboo, by Emile Durkheim (tr.1963)
  3. Elementary Structures Of Kinship, by Claude Lévi-Strauss. (tr.1971).
  4. Child Sexual Abuse and the State, by Ruby Andrew, UC Davis Law Review, vol. 39, 2006.
  5. England: The Autobiography, John Lewis-Stempel, Penguin, 2005.
  6. CHILD AND ADOLESCENT SEXUALITY Ethical Treatment for All Youth. Retrieved July 16, 2007.
  7. List of states with incest loopholes
  8. http://www.berlingske.dk/udland/artikel:aid=870966
  9. Sky News "Challenge To Incest Laws".
  10. BBC News "Couple Stand by Forbidden Love".

References
ISBN links support NWE through referral fees

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