The war radicalised Kisch. He deserted in October 1918 as the war came to an end and played a leading role in the abortive left-wing revolution in Vienna in November of that year. Werfel's novel "Barbara oder die Frömmigkeit" (1929) portrays the events of this period and Kisch was the inspiration for one of the novel's characters. Although the revolution failed, in 1919, Kisch became a member of the Austrian Communist Party and remained a Communist for the rest of his life.