Later based in Germany, he belonged to a group of writers that included the likes of Hans Grimm, Rudolf G. Binding, Emil Strauß, Agnes Miegel and Hanns Johst, all of whom found favour under the Nazis.

Between 1917 and 1925 he produced his most celebrated works, a trilogy of novels about Paracelsus, and in these books Kolbenheyer explored many of the Völkisch movement concepts prevalent at the time by presenting his hero as the Nordic race archetype struggling against racial degeneracy and immorality.

[5] A strong opponent of left-wing politics, he joined Wilhelm Schäfer in resigning from the Akademie der Künste in 1931 over what he saw as their support for the activities of Heinrich Mann and Alfred Döblin.

[8] His 1934 play Gregor und Heinrich, concerning Henry IV, Holy Roman Emperor and Pope Gregory VII, demonstrated an instance of his pro-Nazi stance as he dedicated it to "the German spirit in the process of being resurrected".

[12] Kolbenheyer was banned from writing for five years after the Second World War although from his base in West Germany he continued to publish novels that were largely in the same nationalist spirit as his previous output.