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Bonobos share with strangers.

Publication ,  Journal Article
Tan, J; Hare, B
Published in: PloS one
January 2013

Humans are thought to possess a unique proclivity to share with others--including strangers. This puzzling phenomenon has led many to suggest that sharing with strangers originates from human-unique language, social norms, warfare and/or cooperative breeding. However, bonobos, our closest living relative, are highly tolerant and, in the wild, are capable of having affiliative interactions with strangers. In four experiments, we therefore examined whether bonobos will voluntarily donate food to strangers. We show that bonobos will forego their own food for the benefit of interacting with a stranger. Their prosociality is in part driven by unselfish motivation, because bonobos will even help strangers acquire out-of-reach food when no desirable social interaction is possible. However, this prosociality has its limitations because bonobos will not donate food in their possession when a social interaction is not possible. These results indicate that other-regarding preferences toward strangers are not uniquely human. Moreover, language, social norms, warfare and cooperative breeding are unnecessary for the evolution of xenophilic sharing. Instead, we propose that prosociality toward strangers initially evolves due to selection for social tolerance, allowing the expansion of individual social networks. Human social norms and language may subsequently extend this ape-like social preference to the most costly contexts.

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Published In

PloS one

DOI

EISSN

1932-6203

ISSN

1932-6203

Publication Date

January 2013

Volume

8

Issue

1

Start / End Page

e51922

Related Subject Headings

  • Pan paniscus
  • Motivation
  • Male
  • Helping Behavior
  • General Science & Technology
  • Food
  • Female
  • Feeding Behavior
  • Cooperative Behavior
  • Behavior, Animal
 

Citation

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Tan, J., & Hare, B. (2013). Bonobos share with strangers. PloS One, 8(1), e51922. https://doi.org/10.1371/journal.pone.0051922
Tan, Jingzhi, and Brian Hare. “Bonobos share with strangers.PloS One 8, no. 1 (January 2013): e51922. https://doi.org/10.1371/journal.pone.0051922.
Tan J, Hare B. Bonobos share with strangers. PloS one. 2013 Jan;8(1):e51922.
Tan, Jingzhi, and Brian Hare. “Bonobos share with strangers.PloS One, vol. 8, no. 1, Jan. 2013, p. e51922. Epmc, doi:10.1371/journal.pone.0051922.
Tan J, Hare B. Bonobos share with strangers. PloS one. 2013 Jan;8(1):e51922.

Published In

PloS one

DOI

EISSN

1932-6203

ISSN

1932-6203

Publication Date

January 2013

Volume

8

Issue

1

Start / End Page

e51922

Related Subject Headings

  • Pan paniscus
  • Motivation
  • Male
  • Helping Behavior
  • General Science & Technology
  • Food
  • Female
  • Feeding Behavior
  • Cooperative Behavior
  • Behavior, Animal