"In the social production of their existence men enter into definite, necessary relations, which are independent of their will, namely, relations of production corresponding to a determinate stage of development of their material forces of production. The totality of these relations of production constitutes the economic structure of society, the real foundation on which there arises a legal and political superstructure and to which there correspond definite forms of social consciousness. The mode of production of material life conditions the social, political and intellectual life process in general (3)."

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KARL MARX