So Darwin was not PC? "Social Darwinism" was quite a fad up until WWII. But does the misuse of an idea make it invalid? If so, religion of every stripe is in big trouble.
Didn't Hitler get his idea for the treatment of the retarded from one of the U.S. states; Gorgia, I think
I don't think Geroria gassed the retarded, but involuntary sterilization was practiced is most western countries, including the socialist paradise of Sweden.
We still do involuntary sterilization, but we call it The Pill. And if that fails, we call it Choice.