Active interest in Friedrich Hegel’s ideas died out soon after his death in 1843, but his influence has nonetheless continued in much twentieth-century thought. His ideas were immediately interpreted by the “Right Hegelians,” who believed that the Prussian state represented the final union of philosophy and Christianity, and the “Left Hegelians,” including Ludwig Andreas von Feuerbach (1804–1872) and Karl Marx (1818–1883), who interpreted a politically revolutionary future for the dialectic propounded by Hegel.