Mikhail Andreyevich Suslov (Russian: Михаи́л Андре́евич Су́слов; 21 November [O.S. 8 November] 1902 – 25 January 1982) was a Soviet statesman during the Cold War. He served as Second Secretary of the Communist Party of the Soviet Union from 1965, and as unofficial Chief Ideologue of the Party until his death in 1982. Suslov was responsible for party democracy and the separation of power within the Communist Party. His hardline attitude toward change made him one of the foremost anti-reformist Soviet leaders, bringing him into conflict with Nikita Khrushchev during the latter's term. He was seen as a Leonid Brezhnev's second-in-command, despite his opposition to the one-person rule Brezhnev successfully re-established.