Eugenics was a widely accepted, scientifically based movement that sought to improve society by...

controlling the breeding of humans to increase desirable traits and decrease undesirable ones. This included promoting selective breeding, sterilization of certain individuals, and even euthanasia of those considered to be genetically inferior. The idea was that by controlling reproduction, society could improve overall health, intelligence, and morality. However, eugenics was often used to justify discrimination and oppression of marginalized groups, and it ultimately fell out of favor due to its association with Nazi Germany and its extreme racist policies.