[bronxville]

"We do not stand alone": Nazi poster from 1936 with flags of other countries with compulsory sterilization legislation.

[bronxville]

A poster from a 1921 eugenics conference displays which U.S. states had by then implemented sterilization legislation.

[Cicero]

I used to like the science fiction novels of Cyril Kornbluth, a great imaginative writer.

But one of his novels is along the same lines:

In this near-future novel, all of the dumb people have lots of kids, while the smart ones use birth control and refrain from having any. As a result, the average IQ of the population has been reduced to 40.

I suppose you could read it, not as a eugenics novel, but as a warning that if all the self-defined "smart" people refrain from having kids, the results will not be pretty. Anyway, although very well done, I thought it was pretty questionable when I first read it.