Forty percent of the variation in promiscuous behavior in women could be attributed to genes.
.. Using a virus as a delivery vehicle to transmit the vasopressin receptor gene, it’s easy to artificially boost the number of vasopressin receptors in the brain’s reward center, and make a male vole behave monogamously. The story for female voles is similar except that it is oxytocin, not vasopressin, that triggers monogamous behavior.
.. Oxytocin appears to make us more socially trusting — even in situations where it may not be in our best interest to do so.
Can Your Genes Predict Whether You’ll Be a Conservative or a Liberal?
Conscientiousness, which predicts conservative voting, moderately correlated with proximity to the equator. And Extraversion, which is associated with liberal voting, correlated strongly with greater distance away from the equator.
Temperature also mattered. Hotter climates correlated strongly with Conscientiousness. So even though a political spectrum runs through all populations, groups closer to the equator (and in hotter environments) have a more conservative average group disposition than groups living further away from the equator (and in cooler climes).