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Fairness expectations scaffolded the evolution of larger groups

Published online by Cambridge University Press:  27 November 2025

Oded Ritov Open the ORCID record for Oded Ritov [Opens in a new window] ,
Colin R. Jacobs Open the ORCID record for Colin R. Jacobs [Opens in a new window]  and
Jan M. Engelmann Open the ORCID record for Jan M. Engelmann [Opens in a new window]
Oded Ritov*
Affiliation:
Department of Psychology, University of California, Berkeley, CA, US. oded.ritov@berkeley.edu colin_jacobs@berkeley.edu jan_engelmann@berkeley.edu
Colin R. Jacobs
Affiliation:
Department of Psychology, University of California, Berkeley, CA, US. oded.ritov@berkeley.edu colin_jacobs@berkeley.edu jan_engelmann@berkeley.edu
Jan M. Engelmann
Affiliation:
Department of Psychology, University of California, Berkeley, CA, US. oded.ritov@berkeley.edu colin_jacobs@berkeley.edu jan_engelmann@berkeley.edu
*
*Corresponding author.
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Abstract

We propose that the emergence of relationship-based social expectations and their evolution into fairness expectations played a key role in the size and cohesion of hominin societies. One of the central challenges of group living is the need to create and sustain stable and mutually beneficial patterns of cooperation. By regulating collaborative interactions, social expectations make group living less stressful.

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Type
Open Peer Commentary
Information
Behavioral and Brain Sciences , Volume 48 , 2025 , e180
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Copyright
© The Author(s), 2025. Published by Cambridge University Press

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References

Engelmann, J. M., Clift, J. B., Herrmann, E., & Tomasello, M. (2017). Social disappointment explains chimpanzees’ behaviour in the inequity aversion task. Proceedings of the Royal Society B: Biological Sciences, 284(1861), 20171502. https://doi.org/10.1098/rspb.2017.1502 CrossRefGoogle ScholarPubMed
Engelmann, J. M., Haux, L. M., & Herrmann, E. (2019). Helping in young children and chimpanzees shows partiality towards friends. Evolution and Human Behavior, 40(3), 292–300. https://doi.org/10.1016/j.evolhumbehav.2019.01.003 CrossRefGoogle Scholar
Engelmann, J. M., & Herrmann, E. (2016). Chimpanzees trust their friends. Current Biology, 26(2), 252–256. https://doi.org/10.1016/j.cub.2015.11.037 CrossRefGoogle ScholarPubMed
Engelmann, J. M., Herrmann, E., Proft, M., Keupp, S., Dunham, Y., & Rakoczy, H. (2022). Chimpanzees consider freedom of choice in their evaluation of social action. Biology Letters, 18(2), 20210502. https://doi.org/10.1098/rsbl.2021.0502 CrossRefGoogle ScholarPubMed
Fraser, O. N., Stahl, D., & Aureli, F. (2008). Stress reduction through consolation in chimpanzees. Proceedings of the National Academy of Sciences, 105(25), 8557–8562. https://doi.org/10.1073/pnas.0804141105 CrossRefGoogle ScholarPubMed
Gervais, M. M., & Fessler, D. M. T. (2017). On the deep structure of social affect: Attitudes, emotions, sentiments, and the case of “contempt.” Behavioral and Brain Sciences, 40, e225. https://doi.org/10.1017/S0140525X16000352 CrossRefGoogle ScholarPubMed
Henrich, J., Ensminger, J., McElreath, R., Barr, A., Barrett, C., Bolyanatz, A., Cardenas, J. C., Gurven, M., Gwako, E., Henrich, N., Lesorogol, C., Marlowe, F., Tracer, D., & Ziker, J. (2010). Markets, religion, community size, and the evolution of fairness and punishment. Science, 327(5972), 1480–1484. https://doi.org/10.1126/science.1182238 CrossRefGoogle ScholarPubMed
Ritov, O., Lewis, L. S., Völter, C., Samuni, L., Keltner, D., Herrmann, E., & Engelmann, J. (2025). Chimpanzees Steal Less From Their Friends and Expect Them to Do the Same. OSF. https://osf.io/9fmqz_v1 CrossRefGoogle Scholar
Ritov, O., Völter, C. J., Raihani, N. J., & Engelmann, J. M. (2024). No evidence for inequity aversion in non-human animals: A meta-analysis of accept/reject paradigms. Proceedings of the Royal Society B: Biological Sciences, 291(2035), 20241452. https://doi.org/10.1098/rspb.2024.1452 CrossRefGoogle ScholarPubMed
Samuni, L., Preis, A., Mielke, A., Deschner, T., Wittig, R. M., & Crockford, C. (2018). Social bonds facilitate cooperative resource sharing in wild chimpanzees. Proceedings of the Royal Society B: Biological Sciences, 285(1888), 20181643. https://doi.org/10.1098/rspb.2018.1643 CrossRefGoogle ScholarPubMed
Schino, G., & Aureli, F. (2017). Reciprocity in group-living animals: Partner control versus partner choice. Biological Reviews, 92(2), 665–672. https://doi.org/10.1111/brv.12248 CrossRefGoogle ScholarPubMed
Schino, G., & Aureli, F. (2021). The role of affect in cooperation: How to test the emotional bookkeeping hypothesis. Neuroscience & Biobehavioral Reviews, 120, 262–263. https://doi.org/10.1016/j.neubiorev.2020.11.022 CrossRefGoogle ScholarPubMed
Sell, A., Sznycer, D., Al-Shawaf, L., Lim, J., Krauss, A., Feldman, A., Rascanu, R., Sugiyama, L., Cosmides, L., & Tooby, J. (2017). The grammar of anger: Mapping the computational architecture of a recalibrational emotion. Cognition, 168, 110–128. https://doi.org/10.1016/j.cognition.2017.06.002 CrossRefGoogle ScholarPubMed
Titchener, R., Thiriau, C., Hüser, T., Scherberger, H., Fischer, J., & Keupp, S. (2023). Social disappointment and partner presence affect long-tailed macaque refusal behaviour in an ‘inequity aversion’ experiment. Royal Society Open Science, 10(3), 221225. https://doi.org/10.1098/rsos.221225 CrossRefGoogle Scholar