Robert John Service (born 29 October 1947) is a British historian, academic, and author who has written extensively on the history of the Soviet Union, particularly the era from the October Revolution to Stalin's death. He is currently a professor of Russian history at the University of Oxford, a Fellow of St Antony's College, Oxford, and a senior fellow at Stanford University's Hoover Institution. As an author Service is known for his 2000, 2004, and 2009 biographies of Vladimir Lenin, Joseph Stalin, and Leon Trotsky, respectively.