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Trust-based altruism facing new contexts: The Vyegwa-Gika pygmies from Burundi

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  • Cristina Acedo-Carmona
  • Enric Munar
  • Antoni Gomila

Abstract

The community of Pygmies settled in Vyegwa-Gika provides an exceptional case study to test the role of trust in the evolution of altruism. The Vyegwa-Gika Pygmies were forced to migrate from rainforests to the savanna, changing quickly their environment, culture, and socio-economic situation. Despite the high level of poverty they suffer in this new settlement, we found evidence of strong altruistic attitudes toward trustees when playing an economic game. In addition, Vyegwa-Gika Pygmies keep small personal trust networks despite the fact they share frequent social interactions within the community. These results indicate the great effectiveness of personal trust in fostering altruism, even if the circumstances make it difficult to establish such kind of affective bonds. A theory of the evolution of altruism should therefore also account for the evolution of psychology of trust, as a key element in the process.

Suggested Citation

  • Cristina Acedo-Carmona & Enric Munar & Antoni Gomila, 2018. "Trust-based altruism facing new contexts: The Vyegwa-Gika pygmies from Burundi," PLOS ONE, Public Library of Science, vol. 13(10), pages 1-13, October.
    • Handle: RePEc:plo:pone00:0204321
    DOI: 10.1371/journal.pone.0204321
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