In any case, the Ubermensch will not be descended from Germans or US citizens. Jokes aside, there are three main events that will permanently change the earth. Climate change, genetic engineering and bionic engineering. With the latter I also mean the mixture of technical and genetic research. Humans will inevitably have to modify themselves to face the coming catastrophes, food shortages, drinking water shortages, pandemics and increasing infertility. That means the Ubermensch will become a technical-genetically modified Urmensch with low instincts and strongly hierarchized if not even fascistoids - dictatorial society structures fight over the last edible rat. Because we fucked it up.