Who Are More Helpful, Humans or Chimpanzees?

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Science  03 Mar 2006:
Vol. 311, Issue 5765, pp. 1248-1249
DOI: 10.1126/science.1125141

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Humans, including infants, are more willing than closely-related chimpanzees to cooperate and behave altruistically and cooperatively, probably in part accounting for their evolutionary success.