The thaw in Bulgarian intellectual life had continued from 1951 until the middle of the decade. Chervenkov's resignation and the literary and cultural flowering in the Soviet Union encouraged the view that the process would continue, but the Hungarian revolution of fall 1956 frightened the Bulgarian leadership away from encouragement of dissident intellectual activity. In response to events in Hungary, Chervenkov was appointed minister of education and culture in 1957 and 1958, he purged the leadership of the Bulgarian Writers' Union and dismissed liberal journalists and editors from their positions. His crackdowns effectively ended the "Bulgarian thaw" of independent writers and artists inspired by Khrushchev's 1956 speech against Stalinism. Again mimicking the Soviet party, which purged a group of high officials in 1957, the BCP dismissed three party leaders on vague charges the same year. Among those removed was deputy prime minister Georgi Chankov, an important rival of Zhivkov. The main motivation for this purge was to assure the Soviet Union that Bulgarian communists would not fall into the same heretical behavior as had the Hungarian party in 1956. Through the political maneuvers of the mid-1950s, Todor Zhivkov enhanced his position by identifying with the "Bulgarian" rather than "Soviet" branch of the BCP at the same time as he aligned himself with the new anti-Stalinist faction in the Soviet Union. He established especially close ties with Khrushchev at this time.

Data as of June 1992