"In its most extreme forms, Social Darwinism has been used to justify eugenics programs aimed at weeding "undesirable" genes from the population; such programs were sometimes accompanied by sterilization laws directed against "unfit" individuals. The American eugenics movement was relatively popular between about 1910-1930, during which 24 states passed sterilization laws and Congress passed a law restricting immigration from certain areas deemed to be unfit. Social Darwinist ideas, though in different forms, were also applied by the Nazi party in Germany to justify their eugenics programs. Social Darwinism Whenever a lefty makes a claim always assume the exact opposite is true. In this case, a fascist in another thread has declared that conservatives are bringing back social darwinism. Hmmm, thought I, that's a new one. Let me look into this... And sure enough, it's a darling ideology of the left. Just as their claim that they are particularly attached to the concept of separation of church and state is hiding the fact that they think the state should supplant the church and forbid people from adhering to their faith, the claim that social darwinism is a right wing ideology is hiding the fact that it really is a pet of the left.