Figure 5. Culture-gene coevolution of individualism-collectivism and the serotonin transporter gene.
(a) nations with increased collectivism also show increased prevalence of the S allele; (b) nations with increased contemporary pathogen prevalence are more likely to show collectivistic values due to increased frequency of the S allele of the serotonin transporter gene; (c) nations with increased S allele of the serotonin transporter gene are more likely to show reduced anxiety and mood disorders due to increased prevalence of cultural collectivism (adapted from Chiao & Blizinsky, 2010).