1856-1939 2009g-496 2010k-587 599 aggression aggressivebehaviorinanimals animal biologicalevolution coercion ethology freud freudiantheory fundamentalism homicide individualism interpersonalrelations power(socialsciences) primates psychoanalysis psychology ql775s6781975 religionandpsychology sexualbehavior sigmund socialbehavior socialhierarchyinanimals socialinteraction socialstatus