The preservation of the “superior breed” or biological specimen is the preservation of nature in the world and therefore the guarantee of the emergence of truth about the world. 

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“it didn’t work; it leads to men like Socrates being killed; it leads to the extinction of breeding and therefore of the knowledge of nature in the world; for nature and truth to preserve and manifest themselves the ‘philosophers,’ or rather the erromenesteroi, the men of ‘sufficient nature’ from whom the philosopher would under ideal circumstances organically emerge, must take power in the cities and grasp for a tyranny.” It is the “spiritual tyranny” of pre-Socratic philosophy become politically active under emergency conditions of persecution and turned into the pursuit of actual tyranny.