Karl Kautsky (1854-1938), compiler of Karl Marx's Theories of Surplus Value (1905-10), has been rightly considered the successor of Engels in the intellectual leadership of the Marxian School. Kautsky was the founder of Die Neue Zeit and a political leader of the German Social Democrats. He denounced both Germany's aggression in World War I as well as the conduct of Russian Bolshevism after the 1917 Revolution.At the time of its original publication in 1902, The Social Revolution wascalled one of the most important contributions to Socialist literature during the last decade of the 19th Century.