the Party coup of 1957, orchestrated by Molotov, Kaganovich and Malenjov failed. They were defeated by Khrushcehv's control of the party and support by the army
The internal party coup in 1964 was successful, as it deposed Khrushchev
There were intellectual discontents which were presented through books, some of which were published like One Day in the Life of Ivan Denisovich