What games support the evolution of an ingroup bias?

Journal of Theoretical Biology
Fredrik Jansson

Abstract

There is an increasing wealth of models trying to explain the evolution of group discrimination and an ingroup bias. This paper sets out to systematically investigate the most fundamental assumption in these models: in what kind of situations do the interactions take place? What strategic structures - games - support the evolution of an ingroup bias? More specifically, the aim here is to find the prerequisites for when a bias also with respect to minimal groups - arbitrarily defined groups void of group-specific qualities - is selected for, and which cannot be ascribed to kin selection. Through analyses and simulations of minimal models of two-person games, this paper indicates that only some games are conducive to the evolution of ingroup favouritism. In particular, this class does not contain the prisoners׳ dilemma, but it does contain anti-co-ordination and co-ordination games. Contrasting to the prisoners׳ dilemma, these are games where it is not a matter of whether to behave altruistically, but rather one of predicting what the other person will be doing, and where I would benefit from you knowing my intentions. In anti-co-ordination games, on average, not only will agents discriminate between groups, but also in such a wa...Continue Reading

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Citations

Mar 10, 2016·Scientific Reports·Pouria RamaziFranz J Weissing
Dec 8, 2015·PloS One·Fredrik Jansson, Kimmo Eriksson
Jun 2, 2020·PloS One·Fredrik JanssonMats Lillehagen
Sep 19, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·György SzabóMartin A Nowak

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