There is an amphiboly in Nietzsche between two meanings of 'uebermensch'.   One is a human being who has interiorized and transcended the Christian capacity to take one's own will as an object and to cultivate it, and consciously chooses to live according to the pre-Christian ethic of the master - but as a master who grasps the contingency of his endeavor's founding gesture.  The second uebermesch is a posthuman race, a meta-species to which human history will give birth by coordinating cultural development with biological engineering.   What is the link between these two meanings?   Perhaps it is that the former cannot really come into existence unless its project is in some sense for the sake of the latter.  Or maybe the former's project is always for the sake of the latter, whether this is understood by its agent or not