title: Aggression redefined--its adaptational aspects.
mesh_terms: D000220:Adaptation, Biological; D000374:Aggression; D004328:Drive; D004532:Ego; D006791:Hostility; D006801:Humans; D007323:Instinct; D007398:Interpersonal Relations; D007989:Libido; D011574:Psychoanalytic Theory