Look up Miss Sanger and Planned Parenthood.
There you have the eugenics philosophy as espoused by modern liberalism in a nutshell.
Do note that it is well after Darwins magdumb opus.
Sanger believed in using abortion and eugenics to breed out ‘undesirables’.
I.E., the birth of modern liberalism.
Tell me, did you mainsail that?
I’m aware of Sanger’s comments; they are not even close to the first expressions of such sentiments.