It's natural selection. Failure to reproduce. We like to think we've eliminated natural selection and evolution but we haven't. All we've done is safeguard against "natural" selection pressures and new societal/psychological pressures have taken over. Instead of starving, falling to predation, dying by misadventure, etc the least fit humans are now culling themselves from the gene pool. Feminism has women slaving away for the masters instead of rearing children, the children they do conceive get aborted, men and women are voluntarily sterilizing themselves, they're adopting other peoples children, settling for fur babies, falling for the gay subculture meme, trooning out and destroying their genitals, etc. You should be glad they're weeding themselves out.
This is incidentally also why these people have such a driving need to capture education and children's entertainment. They can't reproduce genetically, so they have to capture the children of others and reproduce ideologically. This is why they fight so hard against charter schools, private schools, and homeschooling. The popularization of those things will impose an expiration date on their horseshit.