Perhaps the greatest deliberate experiment in pervasive distrust was that of Joseph Stalin's Soviet Union during the purge years of the 1930s. Although the apparatus of those years was not fully dismantled soon thereafter, the war with Germany required enough cohesion to make such deep distrust harmful even to Stalin's personal rule. Pol Pot's rule of Cambodia similarly depended on radical use of distrust. In general, pervasive distrust is more quietly used than it was in these two dreadful cases.

XREF: Connects to general knowledge about authoritarian regimes using surveillance and mistrust to maintain control.

Russell Hardin, Trust and Trustworthiness, loc. 467