What was the new racial order proposed by the Nazis?

The Nazi ideology dictated that the Germanic peoples were an Ubermenschen, or superhuman, and thought them to be a master-race which had been contaminated by the presence of Untermenschen, or the sub-human races like the Jews, Romas and Slavs. Through a systematic genocide of the sub-human races, the Nazis envisioned a Europe that was racially pure and consisted of just the Aryan peoples, while the rest were either to be exterminated or used as forced labour for the superior race.