Well, there is the whole left/right 'taste buds' discussion from Johnathan Haidt:
How Jonathan Haidt's 6 Moral Tastebuds Can Heal a Divided World
I don't know if it's biology, epigenetics, genes, upbringing, or programming but there are liberals and conservatives in the world. A few people seem to cross over occasionally, I know I am more conservative now than I was when I was young, having bought into a lot of the programming of the time - which even back then had a 'liberal' feel. Either side can get too extreme. Left-brain and right-brain thinking are very different. Probably many variables are involved in how and why a specific person ends up in a particular camp. I think authoritarians on the left and the right can be OPs, or not. Maybe following authority (left or right) is an indication, but the right seems to have a more 'sophisticated' moral palette.