Morals are sets of unofficial laws between groups of people, e.g. don't steal. Philosophy is the study of morals and what happens when you apply logic to a set of morals. While yes, all morals came from basically the same place, a mutual need to survive as a species, the more you study morals the more different and contradicting rules are, and finding unifying rules is harder. For every new breakthrough, more questions arise than are answered, so it seems to be getting farther away from a universal truth than closer. Anyway, just some of my thoughts on metaphysics (would this be meta metaphysics?). This is a great thought-provoking post.