His 1955 book Die Auflösung der Weimarer Republik (The Disintegration of the Weimar Republic) is his best known book, in which he ascribed the collapse of German democracy not to the Sonderweg ("special path" of German historical development) or other impersonal forces but to human action that followed conscious choice.[1] In that book, Bracher rejected not only the Sonderweg thesis, but also the Marxist theory of National Socialism as the result of a capitalist "conspiracy", the theory that the Treaty of Versailles caused the collapse of the Weimar Republic, and the view that the Nazi dictatorship was simply the work of "fate".[1] Bracher's methodology in Die Auflösung der Weimarer Republik involving a mixture of political science and history was considered to be highly innovative and controversial in the 1950s.[1] The German historian Eberhard Kolb wrote Die Auflösung der Weimarer Republik was "still unsurpassed as a work of research" on the end of the Weimar Republic.[2] Bracher wrote that though almost all Germans rejected the Treaty of Versailles, this dislike of Versailles had nothing with do with the coming of "presidential government" in March 1930 or rise of the Nazi Party starting with the September 1930 Reichstag election.[3] Furthermore, Bracher wrote that under Weimar, the judicial system had already politicized as the judges, almost all of whom had begun their careers in the Imperial era, had a tendency to impose very lenient sentences for political crimes done in the name of the right.[4] In Die Auflösung der Weimarer Republik, Bracher wrote the judiciary was in part responsible for the collapse of the Weimar republic, "contributing to its overthrow by authoritarian and totalitarian movements."[4]