Social responses to the idea of evolution
The problem with Galton's idea is how to decide which features to select. There's so many different skills people could have, you could not agree who was "good stock" and who was "bad stock". There was rather more agreement on who should not be breeding. Several countries passed laws for the compulsory sterilisation of unwelcome groups. Most of these laws were passed during between 1900 and 1940. After World War II, disgust at what the Nazis had done lowered public support for forced eugenics.