There are two diametrically opposed forces at work in human evolution. Biology wants diversity, that's why we have sex; to stir up the gene pool. Diversity increases the chances that at least some of our species will survive a catastrophic event.
Social pressure wants uniformity. My tribe is good, other tribe is bad. Those like me should be protected, those that are different should be destroyed. I think that that is the real basis of racism, sexism, homophobia, religious and all other… Continue