1. Eugenics emerged in Germany in 1904 with the goal of improving racial hygiene and hereditary qualities. This led to a 1933 sterilization law preventing hereditary and mental defects. 2. Eugenics became intertwined with politics in the 1940s, resulting in the involuntary sterilization and genocide of Jews and others in Nazi Germany. 3. Eugenics spread globally in the early 20th century with many countries establishing their own eugenics movements, though it fell out of favor after being associated with Nazi war crimes.