Debates about Darwin and Nietzsche, about evolution and radical moral doubt, echoed through this deeply unsettled period. They represented the two most important ways to conjure up the spirit of the age and its great ideal: the New Man, the answer to the trauma of the war and the reign of anonymous technology. New Men could be bred selectively, and they could create themselves through an act of heroic self-transcendence. It was a great but ambiguous dream, and the image of this great hero was enlisted to serve ideas on both the right and the left, pursued by scientists and occultists alike,
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