Even morality, Wilson would argue later, was guided at least in part by the body and the brain, specifically by the genes that shaped the body and the brain. Hate, love, guilt, and fear, the very emotions consulted by philosophers pondering good and evil, originate in the hypothalamus and the limbic system of the brain, noted Wilson. “What, we are compelled to ask, made the hypothalamus and the limbic system? They evolved by natural selection.”
