%0 Journal Article
%T Intragenerational Cultural Evolution and Ethnocentrism
%A Bruce Edmonds
%A David Hales
%J Journal of Conflict Resolution
%@ 1552-8766
%D 2019
%R 10.1177/0022002718780481
%X Ethnocentrism denotes a positive orientation toward those sharing the same ethnicity and a negative one toward others. Previous models demonstrated how ethnocentrism might evolve intergenerationally (vertically) when ethnicity and behavior are inherited. We model short-term intragenerational (horizontal) cultural adaptation where agents have a fixed ethnicity but have the ability to form and join fluid cultural groups and to change how they define their in-group based on both ethnic and cultural markers. We find that fluid cultural markers become the dominant way that agents identify their in-group supporting positive interaction between ethnicities. However, in some circumstances, discrimination evolves in terms of a combination of cultural and ethnic markers producing bouts of ethnocentrism. This suggests the hypothesis that in human societies, even in the absence of direct selection on ethnic marker¨Cbased discrimination, selection on the use of fluid cultural markers can lead to marked changes in ethnocentrism within a generation
%K tag-based cooperation
%K altruism
%K cultural evolution
%K in-group bias
%K ethnocentrism
%U https://journals.sagepub.com/doi/full/10.1177/0022002718780481