 After the Sino-Soviet split of the 1960s, the Communist Party of China and the Communist Party of the Soviet Union claimed to be the sole heir and successor to Stalin concerning the correct interpretation of Marxism–Leninism and ideological leader of world communism.In that vein, Mao Zedong Thought, Mao Zedong's updating and adaptation of Marxism–Leninism to Chinese conditions in which revolutionary praxis is primary and ideological orthodoxy is secondary, represents urban Marxism–Leninism adapted to pre-industrial China.The claim that Mao had adapted Marxism–Leninism to Chinese conditions evolved into the idea that he had updated it in a fundamental way applying to the world as a whole.