Fear and terror was used to great effect under Stalin's rule. During the great purges people were forced to sell out their friends and family to avoid being purged themselves. These purges also halted the spread of dissent, for anyone how spoke ill of the party was apt to disappear, either executed or sent to one of the forced labor camps in Siberia.
Propaganda was present throughout the soviet union. Because the state controlled the media, nothing, no movie or art or book, was allowed to be created unless it had pro state propaganda value, and posters were present in almost every village. He even used youth groups