In this book, Weikart helps unlock the mystery of Hitler's evil by vividly demonstrating the surprising conclusion that Hitler's immorality flowed from a coherent ethic. Hitler was inspired by evolutionary ethics to pursue the utopian project of biologically improving the human race.

'There have been many attempts to provide the key to Hitler's world of ideas but Richard Weikart has succeeded in revealing what must be the central element in any understanding of Hitler's world view. The terrible paradox at the heart of the Third Reich, that biological utopia could only be created by intense physical suffering and violence, now has a proper explanation. What seemed to others bizarrely immoral appeared to Hitler an honourable duty.' - Richard Overy, Professor of History, University of Exeter, UK