Ethics, evolution, and the milk of human kindness.
D000533:Altruism; D005075:Biological Evolution; D001695:Biology; D004989:Ethics; D005823:Genetics; D005824:Genetics, Behavioral; D040821:Human Characteristics; D006801:Humans; D012945:Social Values; D035503:Sociobiology; D012959:Socioeconomic Factors