Testing the Evolutionary Genetics of Personality: Do Balanced Selection and Gene Flow Cause Genetically Adapted Personality Differences in Human Populations?
This chapter provides empirical evidence bearing on three competing evolutionary genetic scenarios: neutral selection, mutation selection, and balancing selection. Using an innovative research design involving personality assays of inhabitants of three mainland villages and a host of nearby islands, it concludes that the findings support only the balancing selection explanation, while refuting (or finding no support for) the neutral and mutation selection scenarios.
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