 Khrushchev's de-Stalinisation process in Soviet society ended when he was replaced as leader by Leonid Brezhnev in 1964; the latter introduced a level of re-Stalinisation within the Soviet Union.In 1969 and again in 1979, plans were proposed for a full rehabilitation of Stalin's legacy, but on both occasions were defeated by critics within the Soviet and international Marxist–Leninist movement.Gorbachev saw the total denunciation of Stalin as necessary for the regeneration of Soviet society.