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Much research has established reliable cross-population differences in motivations to invest in one's in-group. We compare two current historical-evolutionary hypotheses for this variation based on (1) effective large-scale institutions and

Much research has established reliable cross-population differences in motivations to invest in one's in-group. We compare two current historical-evolutionary hypotheses for this variation based on (1) effective large-scale institutions and (2) pathogen threats by analyzing cross-national differences (N = 122) in in-group preferences measured in three ways.

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    • 2013-05-21
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    Hruschka DJ, Henrich J (2013) Institutions, Parasites and the Persistence of In-group Preferences. PLoS ONE 8(5): e63642. doi:10.1371/journal.pone.0063642

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