 The third problem for Friedländer was that the Nazi period was so unique that it could not easily be fitted into the long-range view of German history as advocated by Broszat.Friedländer maintained that the essence of National Socialism was that it "tried to determine who should and should not inhabit the world", and the genocidal politics of the Nazi regime resisted any attempt to integrate it as part of the "normal" development of the modern world.The debates between Broszat and Friedländer were conducted through a series of letters between 1987 until Broszat's death in 1989.