Original sentence: After World War II, the idea of "racial hygiene" was not promoted.In its earliest incarnation it was concerned more with the declining birthrate of the German state and the increasing number of mentally-ill and disabled people in state-run institutions (and their costs to the state) than with the "Jewish question" and "degeneration of the Nordic race" () which would come to dominate its philosophy in Germany from the 1920s to the Second World War.This was often motivated by belief in a racial hierarchy and the related fear that lower races would "contaminate" a higher one
Edited sentence: After World War II, racial hygiene was not promoted.In its earliest incarnation it was concerned more with the declining birthrate of the German state and the increasing number of mentally-ill and disabled people in state-run institutions (and their costs to the state) than with the Jewish question and "degeneration of the Nordic race" () which would come to dominate its philosophy in Germany from the 1920s to the Second World War.This was often motivated by belief in a racial hierarchy and the related fear that lower races would contaminate a higher one