It's a play on Nietzsche's 'Uber Mensch', the Nazis favorite philosopher's concept, and derivative of.Bismarck's campaign to create a binding sense of cohesion and nationalism inside of the then new German Federation of the 1870's. Max Weber and others were proponents of the 'German People' as a distinct nation and tribe; the Nazis just built on what was already a government policy of the former Imperial govt. and added eugenics and 'scientific' and historical overtones to the concept, so while those words were never literally used, it is an acceptable indication of what they were inventing for themselves and the Nietzchian/Nazi 'Ideal German' fantasy. Nietzsche was a homosexual who was infected with syphilis and died from it, essentially insane, for those unfamiliar with him and his 'philosophy'. The Orthodox Jewish version is also highly racist and fixated on 'racial purity' and their families' genealogies as well; substitute 'Chosen People' for 'Master Race', for instance, and you have more or less the same idea. The idea is as old as the idea of tribes and distinct peoples in human history, not something invented by Nazis or right wing Japanese, despite the modern window dressing 'science' can add to terminology and rhetoric.