This is the first biography of Martov, the founder and leader of Menshevism. It records his revolutionary apprenticeship in Vilno and St Petersburg in 1893-6; his early friendship and partnership with Lenin in Siberian exile and on the revolutionary newspaper Iskra in Munich and London; the dramatic break-up of that partnership at the Second Congress of Russian Social Democrats in 1903 and the division between Mensheviks and Bolsheviks; the ensuing...