"Many Russian and Western scholars have studied Soviet efforts to destroy organized religion and spread atheism in the Soviet population, but far fewer have focused on the steps Soviet officials took to wipe out shamanism, the traditional faith of many peoples in Siberia and the Russian Far East. But Moscow’s efforts in that regard are instructive both to the extent that they paralleled what the communists did to more conventionally structured faiths and even more to the extent they failed because the Soviets did not understand what they were up against and could not deal with a religious practice lacking the kind of organization they could take over and subvert."
January 1, 1970
https://en.wikiquote.org/wiki/Religion_in_Russia