A little research into the proponents of eugenics would be very eye opening to a lot of people.
Indeed it would.
In my undergrad days I took a course in American social and cultural history that was taught by a leftist professor but he was unusual in that he was fair-minded.
He got into the whole eugenics thing and showed how racist the whole business really was; he had some rather harsh things to say about population control and how that had its origins in racism.
He was a very good teacher and some of the things he said made me wonder if he was that rarest of creatures: a prolife leftist.