It’s not the stupid people’s fault. They’ve always bred. The problem is smart people used to as well, and now we’ve stopped. Because of lots of reasons that make sense for the individuals:

- childfree is probably more enjoyable

- kids expensive and student debt crippling, so let’s delay starting till we’re 37 and own a home

- scary time/place to raise kids if you think about it too much

- etc.

So that’s thrown things out of balance. it’s not eugenics to say that smart people shouldn’t hold their birth rate so close to zero.