As a "minor" prophet, Micah is not nearly so well known as other prophets such as Isaiah, Jeremiah and Ezekiel, but he may have been just as influential in his day. Indeed, together with Isaiah, Micah exerted an important influence during the crucial reign of King Hezekiah in the eighth century B.C.E. It may have been at Micah's urging that Hezekiah reversed his father Ahaz' policy and rid Jerusalem of idolatrous practices. Indeed, the Book of Jeremiah credits Micah with risking his life to make his prophecies, which Hezekiah ultimately heeded. The Bible in turn credits Hezekiah's righteousness for staving off the Assyrian invasions which had earlier destroyed forever Judah's counterpart, the northern Kingdom of Israel.
From the standpoint of the Divine Principle, Micah was not only a man of God, but one of the more successful prophets. It was in part because of his courageous stand that Judah survived long enough to develop the religious tradition that it eventually took into exile in Babylon and later brought back to Jerusalem. This tradition ultimately became Judaism; and its sacred scripture, the Hebrew Bible, provided the foundation for the emergence of both Christianity and Islam.
A close study of the Book of Micah reveals that one of the most famous prophecies of Isaiah is also found verbatim among the words attributed to Micah:
They will beat their swords into plowshares and their spears into pruning hooks. Nation will not take up sword against nation, nor will they train for war anymore. (Micah 4:3; Isaiah 2:4)
This passage was quoted by the Reverend Sun Myung Moon in a speech entitled "God's Ideal Family—the Model for World Peace" which he delivered throughout the world in 2006.
Micah's prophecy of a new, righteous ruler of Judah arising out of Bethlehem is also significant, for this prophecy led to belief among some Jews during the time of Jesus that the Messiah would come from that town. The Gospels' tradition of Jesus being born in Bethlehem thus comes from the Book of Micah, as it is found no where else in the Hebrew Bible.