Something other than a reborn Germany arose in the 1920s and 1930s. Across the world a new ideology that promoted the genetic purity of humanity took form. Master Races were declared with those of less fortunate lineages considered second-class humans by their natural superiors. The mentally ill were castrated in Germany and America. Abortion mills were built in black neighborhoods to reduce their numbers. And Anti-Semitism reached new heights throughout the world.