 As an ideology, it was developed by Joseph Stalin in the late 1920s based on his understanding and synthesis of both orthodox Marxism and Leninism.It was the official state ideology of the Soviet Union and the other ruling parties making up the Eastern Bloc as well as the political parties of the Communist International after Bolshevisation.Today, Marxism–Leninism is the ideology of Stalinist and Maoist political parties around the world and remains the official ideology of the ruling parties of China, Cuba, Laos and Vietnam.