Gates father was a President of Planned Parenthood and had lots of grooming from his parents.
Margret Sanger the founder of Planned Parenthood was a proponent of eugenics.
“Sanger was a proponent of negative eugenics, which aims to improve human hereditary traits through social intervention by reducing the reproduction of those who were considered unfit. Sanger’s eugenic policies included an exclusionary immigration policy, free access to birth control methods and full family planning autonomy for the able-minded, and compulsory segregation or sterilization for the profoundly retarded.
Following Sanger, Alan Frank Guttmacher, MD was President of Plsnned Parenthood, (1898–1974) was an American obstetrician/gynecologist. He served as president of Planned Parenthood and vice-president of the American Eugenics Society.” Wikipedia