title: Chimpanzees are vengeful but not spiteful.
abstract: People are willing to punish others at a personal cost, and this apparently antisocial tendency can stabilize cooperation. What motivates humans to punish noncooperators is likely a combination of aversion to both unfair outcomes and unfair intentions. Here we report a pair of studies in which captive chimpanzees (Pan troglodytes) did not inflict costs on conspecifics by knocking food away if the outcome alone was personally disadvantageous but did retaliate against conspecifics who actually stole the food from them. Like humans, chimpanzees retaliate against personally harmful actions, but unlike humans, they are indifferent to simply personally disadvantageous outcomes and are therefore not spiteful.
authors.affiliation: Max Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, D-04103 Leipzig, Germany. jensen@eva.mpg.de
authors.forename: Keith
authors.initials: K
authors.lastname: Jensen
authors.forename: Josep
authors.initials: J
authors.lastname: Call
authors.forename: Michael
authors.initials: M
authors.lastname: Tomasello
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D003299:Cooperative Behavior; D005260:Female; D008297:Male; D009042:Motivation; D002679:Pan troglodytes / Q000523:psychology*; D011678:Punishment