Eugenics, in one form or another, has been around for a long time. It didn't start with Darwin.
Greek warrior Spartan civilization. Weakling infants were left in the mountains to die.
The Republic, Book 5, Section 1. Plato recommended state-supervised selective breeding of children.
History of Australia. Before Darwin, England exiled criminals to purify the race.
Actually, Australians consider that that worked.