behavior evolutionary perspective infanticide intelligence marriage patterns promiscuity perception beauty bride price altruism allocation parental care explored testing predictions derived idea conscious unconscious behaviours evolved maximize inclusive fitness findings impressive social behaviour animal encyclop dia britannica encyclop dia britannica online encyclop dia britannica web january https wwwbritannicacom topic animal social behaviour proximate mechanisms social behaviour ref ref historical topics proponents evolutionary psychology made explorations historical events response historical experts highly negative little effort continue line
Social science Psychology Evolutionary psychology