Vladimir Lenin believed that the
Russian Civil War represented the peak of
class struggle that had been resolved in 1920s through the establishing the
workers' state in Russia where the
bourgeois class was effectively rooted out. Contrary to such position,
Joseph Stalin proposed that the further the country moved forward in constructing socialism, the more acute the forms of struggle that would be used by the doomed remnants of
exploiter classes in their last desperate efforts. Therefore
political repression was necessary to prevent them from succeeding in their presumed goal of destroying the
Soviet Union. Stalin put forth this theory in 1929 in the special section of his speech "The
Right Deviation in the C.P.S.U.(B.)" at the plenum of the Central Committee and Central Control Commission, C.P.S.U.(B.) held 16–23 April 1929, which concluded: The dying classes are resisting, not because they have become stronger than we are, but because socialism is growing faster than they are, and they are becoming weaker than we are. And precisely because they are becoming weaker, they feel that their last days are approaching and are compelled to resist with all the forces and all the means in their power. Such is the mechanics of the intensification of the class struggle and of the resistance of the capitalists at the present moment of history. Stalin believed that the class enemy could even worm its way into the
Bolshevik Party claiming to lead a
socialist state. He evaluated his associates of the day based on whether they acted on that belief or the belief that a party could have no enemies inside it. Tolerance inside the party to those who disagreed with the official
party line was called "rotten
liberalism" by Stalin. He believed such tolerance would make the party weak and eventually lead to its destruction. As a result, he argued that
purges were sometimes necessary. The notion of the aggravation of class struggle under socialism was not shared by many other prominent leaders, such as
Nikolai Bukharin or
Leon Trotsky, who argued that there was no longer any bourgeoisie in the Soviet Union to have to struggle with and that the very definition of socialism implies there are no longer antagonistic classes. According to historian
Timothy Snyder, the "theory" served the Stalinist regime both as self-justification for the failures of its policies of
collectivization (which were to be blamed on saboteurs rather than on the implementation of the programme) and as an ideological tool for the continuation of mass repression: == Maoism ==