I think I can speak for all of my fellow biologists when I say we would never say any such thing. The fact that family sizes vary may have a lot, a little, or nothing at all to do with human evolution. There are a host of non-biological/genetic factors that contribute strongly to family size variation including income, culture, values, and geography, to name just a few. These things are highly mutable and change widely over time. I have not read the PNAS paper so won’t comment on its relative merits but I highly doubt the authors intent was to prove that “natural selection has not stopped.”

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Research scientist (Ph.D. micro/mol biology), Thought middle manager, Everyday junglist, Selecta (Ret.), Boulderer, Cat lover, Fish hater

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