Assertion: bloc | /r/CapableOf | begin disintegrating in 1960
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text: When, in the interest of reforms and modernization, Stalin's successor Nikita S. Khrushchev and, even more, Mikhail S. Gorbachev, restricted the use of terror within the USSR and police violence and military intervention in the communist bloc, the bloc began disintegrating in the 1960s and broke apart completely between 1989 and 1991, after the semi-free elections in Poland in June 1989 and the establishment in September 1989 of the first Polish government after World War II that was not dominated by communists from the Polish United Workers' Party.