Abstract
Christian Emden has written an informative if sometimes philosophically frustrating book about Nietzsche’s engagement with both neo-Kantian philosophers 1 and the life sciences from the 1840s onward. Emden documents the preceding with an eye to shedding light not only on Nietzsche’s naturalism, on “what does it mean to ‘translate humanity back into nature’” as Nietzsche put it in BGE, but also on what Emden calls “the problem of normativity,” variously stated as how to “obtain an understanding of the sources of normativity without appealing to normativity as a standard separate from the agency, affects...