Nazi eugenics
After 1945, however, historians began to try to portray the U.S. eugenics movement as distinct and distant from Nazi eugenics. Jon Entine wrote that eugenics simply means "good genes" and using it as synonym for genocide is an "all-too-common distortion of the social history of genetics policy in the United States." According to Entine, eugenics developed out of the Progressive Era and not "Hitler's twisted Final Solution."