https://en.wikipedia.org/wiki/Khrushchev_Thaw
The Khrushchev Thaw (Russian: хрущёвская о́ттепель, tr. khrushchovskaya ottepel, IPA: [xrʊˈɕːɵfskəjə ˈotʲ:ɪpʲɪlʲ] or simply ottepel) is the period from the mid-1950s to the mid-1960s when repression and censorship in the Soviet Union were relaxed due to Nikita Khrushchev's policies of de-Stalinization and peaceful coexistence with other nations.