Ruth Bettina Birn's extremely critical assessment of Goldhagen's book, A Nation on Trial: The Goldhagen Thesis and Historical Truth; stating that "Finkelstein and Birn provide a devastating critique of Daniel Goldhagen's simplistic and misleading interpretation of the Holocaust. Their contribution to the debate is, in my view, indispensable." Structuralist views Like Broszat, Kershaw sees the structures of the Nazi state as far more important than the personality of Hitler (or any other individual for that matter) as an explanation for the way Nazi Germany developed. In particular, Kershaw subscribes to the view argued by Broszat and the German historian Hans Mommsen that Nazi Germany was a chaotic collection of rival bureaucracies in perpetual power struggles with each other. In Kershaw's view, the Nazi dictatorship was not a totalitarian monolith, but rather an unstable coalition of several blocs in a "power cartel" comprising the NSDAP, big business, the German state bureaucracy, the Army and SS/police agencies (and moreover, each of the "power blocs" in turn were divided into several factions). In Kershaw's opinion, the more "radical" blocs such as the SS/police and the Nazi Party gained increasing ascendancy over the other blocs after the 1936 economic crisis, and from then onwards increased their power at the expense of the other blocs. For Kershaw, the real significance of Hitler lies not in the dictator himself, but rather in the German people's perception of him. In his biography of Hitler, Kershaw presented him as the ultimate "unperson"; a boring, pedestrian man devoid of even the "negative greatness" attributed to him by Joachim Fest. Kershaw rejects the great man theory of history and has criticised those who seek to explain everything that happened in Nazi Germany as the result of Hitler's will and intentions. Kershaw has argued that it is absurd to seek to explain German history in the Nazi era solely through Hitler, as Germany had sixty-eight million people during the Nazi era, and to seek to explain the fate of sixty-eight million people solely through the prism of one man is in Kershaw's opinion a flawed position. Kershaw wrote about the problems of an excessive focus on Hitler that "even the best biographies have seemed at times in danger of elevating Hitler's personal power to a level where the history of Germany between 1933 and 1945 becomes reduced to little more than an expression of the dictator's will". Kershaw has a low