If there is a gay gene, gay marriage and adoption will pull it out of circulation soon.
This is the usual and obvious response to people who say that gayitude can’t be genetic because otherwise it would have been selected out already. Bruh, before we had gay liberation being gay was not a major knock on fertility since you would probably be having kids anyway. Fortunately, now we do have gay liberation so we can weed the queers out of the gene pool as Darwin intended.
Cochran goes off against the “gay uncle” theory and other cockamamie schemes which claim that gayness is not selected out of the population because of some offsetting benefit, by making the entirely true point that the benefits to your family have to huge in order to compensate for taking you out of the gene pool entirely. However, this objection loses a lot of its force if the fertility loss from homosexuality is small. If homosexuals reproduce at rates similar to heterosexuals, then having the gay gene becomes all-upside from a Darwinian perspective.
Seen in this light, homophobia is a eugenic cultural institution which keeps gay genes in the gene pool by forcing even obligate homosexuals to marry and have children.
Personal anecdote indicates that Cochran is probably on so something:
http://slartibartfastibast.com/post/159672281259/i-imagine-one-of-those-big-complex-things-being
It’s semi-heritable but non-genetic:
http://slartibartfastibast.com/post/114665865499/being-suspicious-of-gmos-is-only-irrational-if-you
I think it’s an alternative developmental trajectory that can reduce intermale competition for mates or something. Seems like it could be more influenced by early environmental triggers than anybody wants to admit. In-utero tuning to the parental environment is probably part of it. Cochran goes so far as to say that it has to be partly communicable, which would upset a lot of people.
I mean, Alzheimer’s is apparently bacterial/microbiomic in origin, but nobody treats it like it’s communicable because it really doesn’t look like it is. The vector would have to be extremely convoluted and indirect.
Also, humans are probs eusocial:
http://slartibartfastibast.com/post/160728219904/contra-scott-alexander-on-prestigeI don’t think we’ll lose the gays for another reason - by the end of the century, we will have figured out how to make new people gay or bisexual on purpose. That has to be factored in to the calculations.

