The concept of revolution in Marxian theory telescopes an entire historical period: the final stage of capitalism; the transitional period of proletarian dictatorship, and the initial stage of socialism. It is in a strict sense a historical concept, projecting actual tendencies in the society; and it is a dialectical concept, projecting the counter-tendencies within the respective historical period, in as much as they are inherent in this period. These tendencies and counter-tendencies are manifestations of which Marxian theory and practice themselves are essential elements. Marxian theory itself is a power in the historical struggle, and to the degree to which its concepts, “translated” into practice, become forces of resistance, change and reconstruction; they are subject to the vicissitudes of this struggle, which they reflect and comprehend, but do not dominate. “Re-examination” is therefore an element of the concept of revolution, part of its internal development.