In the 20th century, the Communist Party of the Soviet Union (CPSU) continued regarding itself as the institutionalization of Marxist-Leninist political consciousness in the Soviet Union; therein lay the justification for its political control of Soviet society. Article 6 of the 1977 Soviet Constitution refers to the CPSU as the "leading and guiding force of Soviet society, and the nucleus of its political system, of all state organizations and public organizations". The CPSU, precisely because it was the bearer of Marxist-Leninist ideology, determined the general development of society, directed domestic and foreign policy, and "imparts a planned, systematic, and theoretically substantiated character" to the struggle of the Soviet people for the victory of Communism.