The concept of phylogenetic regression.
D000374:Aggression; D001519:Behavior; D002540:Cerebral Cortex / Q000502:physiology; D003299:Cooperative Behavior; D004291:Dominance-Subordination; D004644:Emotions; D006126:Group Processes; D006801:Humans; D007266:Inhibition, Psychological; D007323:Instinct; D009633:Nonverbal Communication; D010802:Phylogeny; D010990:Pleasure-Pain Principle; D011574:Psychoanalytic Theory; D012043:Regression, Psychology