Eugenics was a popular early 20th century social movement in the U.S. that aimed to improve society by preventing the reproduction of those deemed "unfit." It led 32 states to sterilize over 64,000 Americans and targeted poor, immigrants, the mentally ill, and unwed mothers. While originally a scientific concept, eugenics was applied in a pseudoscientific way to justify racism and discrimination. Recent efforts have focused on removing the names of prominent eugenics supporters from institutions and honors to acknowledge its roots in scientific racism.