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The Good, the Bad and the Stochastic: How Living in Groups Innately Supports Cooperation

Steiner, K. F.

2021-02-23 evolutionary biology
10.1101/2021.02.21.431661 bioRxiv
Show abstract

Based on theoretical considerations and computer simulations, I show that living in groups brings advantages for cooperative traits through purely stochastic effects that result from the division of a population into groups. These advantages can be sufficient to compensate individual selection pressures that may be associated with the cooperative traits. In more complex agent-based simulation models, this effect combined with some migration between the groups leads to stable dynamic equilibria between cooperative and defective replicators in the population.

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