title: Marxism–Leninism
context: In the late 1920s, after the death of Lenin, Stalin established universal ideologic orthodoxy in the Communist Party, the USSR, and the Communist International, with his coinage Marxism–Leninism, a term which redefined theories of Lenin and Marx to establish universal Marxist–Leninist praxis for the exclusive, geopolitical benefit of the USSR.[6][7] In the late 1930s, Stalin's official textbook The History of the Communist Party of the Soviet Union (Bolsheviks) (1938), made the term Marxism–Leninism common, political-science usage among communists and non-communists.[8]
question: When was Marxism-Leninism instated in the Soviet Union?
answers: 1920s