German collagist, draughtsman, writer and publisher. Although he came from an upper middle-class family, after serving as a volunteer in World War I he became a pacifist and a supporter of democratic socialism on Soviet lines. In 1918 he began a political career as a committee member of the mid-Rhine district of the Independent Social-Democratic Party, a Marxist party that had split from the Social-Democratic Party of Germany. The short-lived journal he edited, ...