of Nazism and protest against their use of his concept. He had his honorary professorship removed when Adolf Hitler came to power. In 1914, at the beginning of World War I, the Emperor Wilhelm II proclaimed before the Reichstag the Burgfrieden ("peace in the castle" or "truce in the castle", a kind of "unity within a besieged castle" for the duration of the conflict), announcing that henceforward all of the regional differences between the different states of the Reich; between rich, middle class and poor; between Roman Catholics and Protestants; and between rural and urban no longer existed and the German people were all one for the duration of the war. During the war, many Germans longed to have the sense of unity that the Burgfrieden inspired continue after the war, and it was during this period that many ideas started to circulate about how to convert the wartime Burgfrieden into a peacetime Volksgemeinschaft. In the aftermath of World War I, the idea of Volksgemeinschaft was used to interpret economic catastrophes and hardship facing Germans during the Weimar Republic era as a common experience of the German nation and to argue for German unity to bring about renewal to end the crisis. It was invoked by the Jewish social anarchists Gustav Landauer (who was killed for his participation in the Bavarian Soviet Republic) and Erich Mühsam (who died in Oranienburg concentration camp) in articulating their vision of a peaceful, non-coercive mutualist society. However, it was subsequently adopted by the Nazi Party to justify actions against Jews, profiteers, Marxists, and the Allies of World War I, whom the Nazis accused of obstructing German national regeneration, causing national disintegration in 1918 and Germany's defeat in World War I. There is an ongoing debate among historians as to whether a Volksgemeinschaft was or was not successfully established between 1933 and 1945. This is a notably controversial topic of debate for ethical and political reasons, and is made difficult by the ambiguous language employed by Hitler and the Nazis when talking about the Volksgemeinschaft. Nazi Volksgemeinschaft In the aftermath of the November Revolution of 1918 that marked the end of the German Empire and the beginning of the Weimar Republic, there was strong animosity amongst many Germans towards the Weimar Republic and the social democrats who sponsored its creation. This was combined with anxiety in the 1930s and with the severe economic crisis in