There is, I wish to suggest, a strong possibility that homosexuality is normal in a biological sense, that it is a distinctive beneficial behavior that evolved as an important element of early human social organization. Homosexuals may be the genetic carriers of some of mankind’s rare altruistic impulses…
Homosexuality is above all a form of bonding. It is consistent with the greater part of heterosexual behavior as a device that cements relationships. The predisposition to be a homophile could have a genetic basis, and the genes might have spread in the early hunter-gatherer societies because of the advantages they conveyed to those who carried them. This brings us to the nub of the difficulty, the problem most persons have in regarding homosexuality to be in any way “natural.”
How can genes predisposing their carriers towards homosexuality spread through the population if homosexuals have no children? One answer is that their close relatives could have had more children as a result of their presence. The homosexual members of primitive societies could have helped members of the same sex either while hunting and gathering or in more domestic occupations at the dwelling sites. Freed from the special obligations of parental duties, they would have been in a position to operate with special efficiency in assisting close relatives. They might further have taken the roles of seers, shamans, artists, and keepers of tribal knowledge. If the relatives - sisters, brothers, nieces, nephews, and others - were benefited by higher survival and reproduction rates, the genes these individuals shared with the homosexual specialists would have increased at the expense of alternative genes. Inevitably, some of these genes would have been those that predisposed individuals towards homosexuality.