Based on Darwin's theory of evolution and natural selection, "Evolutionary Psychology" claims that "its all in our genes."

Popular and scientific literature is still permeated with male aggression as a product of long evolution. The fact that violent aggression appears in the archeological records less than half as long ago as artistic expression should give pause to any student of human behavior. Humans are nothing like apes--chimpanzees, bonobos, gorillas, or orangutans which developed their mating systems independently from humans, and from each other. Chimpanzees have a promiscuous mating system, bonobos are completely hedonistic, gorillas have a harem system, and orangutans are essentially solitary. In those...