" An important aspect of the party’s claim to cultural vanguard status was its possession of esoteric knowledge, namely Marxist-Leninist ideology. Knowledge of the basics of historical and dialectical materialism was a prerequisite for all Communists. What this meant in practice was a grasp of Marx’s theory of historical development, which showed that the driving power of history was class struggle; that capitalism throughout the world must ultimately succumb to proletarian revolution, as it had done in Russia in 1917; and that in the course of time the revolutionary proletarian dictatorship would lead the society to socialism. To outsiders, the boiled-down Marxism of Soviet political literacy courses might look simplistic, almost catechismic. To insiders, it was a “scientific” worldview that enabled its possessors to rid themselves and others of all kinds of prejudice and superstition—and incidentally master an aggressive debating style characterized by generous use of sarcasm about the motives and putative “class essence” of opponents. Smugness and tautology, along with polemical vigor, were among the most notable characteristics of Soviet Marxism. "

― Sheila Fitzpatrick , Everyday Stalinism: Ordinary Life in Extraordinary Times: Soviet Russia in the 1930s