History of the Soviet Union (1964–82) Brezhnev remained wary of any sort of intervention and Kosygin reminded leaders of the consequences of the Soviet suppression of the 1956 Hungarian revolution. In the aftermath of the invasion the Brezhnev Doctrine was introduced; it stated that the Soviet Union had the right to intervene in any socialist country on the road to communism which was deviating from the communist norm of development. The doctrine was condemned by Romania, Albania and Yugoslavia. As a result, the worldwide communist movement became poly-centric, meaning that the Soviet Union lost its role as 'leader' of the world communist movement. In the aftermath
25th Congress of the Communist Party of the Soviet Union or fight other countries, but also stated that he would support national liberation movements, despite détente. Little mention was made of fundamental problems facing the Soviet Union— the slowdown of the rate of economic growth, the low output of agriculture despite heavy investment. The only critical voices raised were those of foreign Communists. French Communist leader Georges Marchais boycotted the congress after criticizing the Soviet Union's suppression of dissidents. A major problem that faced Soviet leaders, and one that was continually evaded, was the need to rejuvenate the Politburo, which was elected at the 1st Plenary Session of the 25th