Aggression--physiology Altruism Anthropology, Cultural--education History, 15th Century History, 16th Century History, 17th Century History, 18th Century History, 19th Century History, 20th Century History, Ancient History, Medieval Human Characteristics Interpersonal Relations--history Prejudice Risk-Taking Social Behavior Disorders--economics Social Control Policies--economics Social Dominance--history Violence--economics Warfare