if feminists have fewer children, then all the genes that predispose one to being feminist (and to anything else that corrlates) will be selected against
That applies to homosexuality in spades, and yet gay people haven't been washed out of populations.
By the way, keep in mind that "feminist" is not a very precise label. In particular, there is a rather large difference between the first-wave feminists (e.g. Camille Paglia) and third-wave feminists (e.g. Lena Dunham, I guess?). They don't like each other at all.
there was a theory that the genes that confer gay men also confer extra fertility for women (and twinning). So keeping the genes in the population via other mechanisms. (I think the research was in Italian families, no link sorry.)
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