p A realisation of the inconsistency, incompleteness, and one-sidedness of the old materialism convinced Marx of the necessity of "bringing the science of society ... into harmony with the materialist foundation, and of reconstructing it thereupon".^^14^^ Since materialism in general explains consciousness as the outcome of being, and not conversely, then materialism as applied to the social life of mankind has to explain social consciousness as the outcome of social being. "Technology," Marx writes (Capital, Vol. I), "discloses man’s mode of dealing with Nature, the immediate process of production by which he sustains his life, and thereby also lays bare the mode of formation of his social relations, and of the mental conceptions that flow from them." In the preface to his Contribution to the Critique of Political Economy, Marx gives an integral formulation of the fundamental principles of materialism as applied to human society and its history, in the following words:

p “In the social production of their life, men enter into definite relations that are indispensable and independent of their will, relations of production which correspond to a definite stage of development of their material productive forces.

p “The sum total of these relations of production constitutes the economic structure of society, the real foundation, on which rises a legal and political superstructure and to which correspond definite forms of social consciousness. The mode of production of material life conditions the social, political and intellectual life process in general. It is not the consciousness of men that determines their being, but, on 19 the contrary, their social being that determines their consciousness. At a certain stage of their development, the material productive forces of society come in conflict with the existing relations of production, or—what is but a legal expression for the same thing—with the property relations within which they have been at work hitherto. From forms of development of the productive forces these relations turn into their fetters. Then begins an epoch of social revolution. With the change of the economic foundation the entire immense superstructure is more or less rapidly transformed. In considering such transformations a distinction should always be made between the material transformation of the economic conditions of production, which can be determined with the precision of natural science, and the legal, political, religious, aesthetic or philosophic—in short, ideological forms in which men become conscious of this conflict and fight it out.

p “Just as our opinion of an individual is not based on what he thinks of himself, so we cannot judge of such a period of transformation by its own consciousness; on the contrary, this consciousness must be explained rather from the contradictions of material life, from the existing conflict between the social productive forces and the relations of production.... In broad outlines Asiatic, ancient, feudal, and modern bourgeois modes of production can be designated as progressive epochs in the economic formation of society" (cf. Marx’s brief formulation in a letter to Engels dated July 7, 1866: "Our theory that the organisation of labour is determined by the means of production").

The discovery of the materialist conception of history, or more correctly, the consistent continuation and extension of materialism into the domain of social phenomena, removed the two chief shortcomings in earlier historical theories. In the first place, the latter at best examined only the ideological motives in the historical activities of human beings, without investigating the origins of those motives, or ascertaining the objective laws governing the development of the system of social relations, or seeing the roots of these relations in the degree of development reached by material production; in the second place, the earlier theories did not embrace the activities of the masses of the 20 population, whereas historical materialism made it possible for the first time to study with scientific accuracy the social conditions of the life of the masses, and the changes in those conditions. At best, pre-Marxist “sociology” and historiography brought forth an accumulation of raw facts, collected at random, and a description of individual aspects of the historical process. By examining the totality of opposing tendencies, by reducing them to precisely definable conditions of life and production of the various classes of society, by discarding subjectivism and arbitrariness in the choice of a particular “dominant” idea or in its interpretation, and by revealing that, without exception, all ideas and all the various tendencies stem from the condition of the material forces of production, Marxism indicated the way to an all-embracing and comprehensive study of the process of the rise, development, and decline of socio- economic systems. People make their own history, but what determines the motives of people, of the mass of people, i.e., what gives rise to the clash of conflicting ideas and strivings? What is the sum total of all these clashes in the mass of human societies? What are the objective conditions of production of material life that form the basis of all of man’s historical activity? What is the law of development of these conditions? To all these Marx drew attention and indicated the way to a scientific study of history as a single process which, with all its immense variety and contradictoriness, is governed by definite laws.