Abstract
The general notion of the development of productive forces is, according to the materialist understanding of history, the point of departure for the solution of numerous concrete problems in Marxist-Leninist social theory and current revolutionary practice. It offers decisive arguments for the critique of Right and "Left" revisionism and reformism. In the course of the disputes that have recently begun in the Marxist economic and philosophical literature with regard to the basic questions involved in this problem, substantial gaps are found specifically in the development of general theory. What is the internal contradiction moving within the forces of production; in what lies the distinction between their existence and essence, essence and appearance? A correct understanding of the processes involved in the resolution of this contradiction in real life, in revolutionary practice, depends upon attaining the utmost clarity with regard to these questions