The "Rich Gay Uncle Hypothesis," also known as the "gay uncle hypothesis" or the kin selection hypothesis, suggests that homosexual individuals who do not have children of their own may increase the prevalence of their family's genes in future generations by providing resources to their relatives' offspring. This includes providing food, supervision, defense, or shelter. The hypothesis is rooted in the idea that male homosexuality has a hereditary component. Since homosexual men are less likely to reproduce, scientists have questioned how genes linked to homosexuality are maintained in the population.
Evolutionary psychologist Paul Vasey and his student Doug VanderLaan tested the kin selection hypothesis, observing that "fa'afafine" in Samoa, who are effeminate men exclusively attracted to men, demonstrated more altruistic behavior toward their nieces and nephews compared to other groups. These findings suggest that homosexual individuals may be biologically predisposed to help raise the offspring of their siblings and other relatives. Some studies propose that genes predisposing to homosexuality might offer certain advantages in heterosexual individuals who carry them. While the "rich gay uncle" concept has been tested in Western societies, results haven't consistently supported the hypothesis.
