Intergroup Aggression in Chimpanzees and War in Nomadic Hunter-Gatherers

  title={Intergroup Aggression in Chimpanzees and War in Nomadic Hunter-Gatherers},
  author={Richard W. Wrangham and Luke Glowacki},
  journal={Human Nature},
Chimpanzee and hunter-gatherer intergroup aggression differ in important ways, including humans having the ability to form peaceful relationships and alliances among groups. This paper nevertheless evaluates the hypothesis that intergroup aggression evolved according to the same functional principles in the two species—selection favoring a tendency to kill members of neighboring groups when killing could be carried out safely. According to this idea chimpanzees and humans are equally risk… 

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