# game: where cooperation is flexible, not fixed

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- Assortment on cooperation is a characteristic feature of hunter-gatherer life
- Assortment persists despite substantial migration and residential mixing
- No evidence for stable social types or a preference to live with cooperators
- Individuals respond in kind to the cooperative behavior of their group members
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Kristopher M. Smith, Tomas Larroucau, et al.  Hunter-Gatherers Maintain Assortativity in Cooperation despite High Levels of Residential Change and Mixing. Curr Biol doi: 10.1016/j.cub.2018.07.064 Sep 20, 2018.

https://www.cell.com/current-biology/fulltext/S0960-9822(18)30994-1

Nomadic hunter-gatherers show that cooperation is flexible, not fixed. University of Pennsylvania.  Sep 20, 2018.

https://m.phys.org/news/2018-09-nomadic-hunter-gatherers-cooperation-flexible.html