Evolution of Homosexuality in the Human Males: Improved Mixed-Team Performance Hypothesis
Male homosexual preference (MHP) is present in many human societies, making up a small but significant cohort. Because homosexual mate preferences are associated with lower fecundity, many evolutionary explanations have been advanced to account for the persistence of this trait. After reviewing a number of these hypotheses and finding room for additional explanations, we propose a new hypothesis that depends on the observed greater empathy and reduced hostility of men who express MHP. This gives them a central role in the performance of groups or teams (all male and mixed) where cooperation and intra-team coherence are at a premium. In this view, teams that contain men with MHP will outcompete teams without such men, other variables being similar. The links between personality traits and team performance do not require homosexual activity within the group. The hypothesis is supported by observations of the personality traits associated with MHP, such as increased agreeableness, which is linked to the literature on team cohesion and performance in sports and other kinds of teams and groups. This novel hypothesis could be examined through direct study of team performance. The proposed hypothesis may also have relevance to better performance among the diverse teams whose efficient performance is so important in modern society.