The fate of Pluto, that it was identified as the ninth planet and later reclassified as a dwarf planet, shows a process of developing understanding of the solar system by humanity.
In the Unification Thought (UT), the origin and formation of the solar system is to create the planet Earth where human beings can develop and dwell safely. For this reason, the inner part of the solar system had to be relatively clear, populated with regularly placed planets. Only outside the Mars' orbit, dwarf planets and asteroids dominate the region, and after gas giants such as Jupiter and Saturn dominate the outside the main asteroid belt, different kinds of objects start, including Pluto, which are parts of the Kuiper Belt.
This expanding observation of the outer solar system and the new knowledge of its structure brought to us at the same time are likely to converge eventually to a full understanding on how our solar system came to exists in the current mode. According to UT, all the objects should have its individual and whole purposes, both serving for its own existence and contributing to the whole. Pluto is no exception. It was the first object which is not the traditional planet, the first discovery of the Kuiper Belt objects, and a large-scale binary system. With the recognition of the Kuiper Belt, humanity has reached an integrated understand of short-period comets, Pluto-Charon, and other Trans-Neptunian objects, which lie outside the eight-planet, inner solar system.