" Another antidote to despair over the ultimate baseness of human motivation is, oddly enough, gratitude. If you don’t feel thankful for the somewhat twisted moral infrastructure of our species, then consider the alternative. Given the way natural selection works, there were only two possibilities at the dawn of evolution: (a) that eventually there would be a species with conscience and sympathy and even love, all grounded ultimately in genetic self-interest; (b) that no species possessing these things would ever exist. "

― Robert Wright , The Moral Animal: Why We Are the Way We Are - The New Science of Evolutionary Psychology