 In The German Ideology manuscripts, Marx and Engels contrast their new materialist method with the idealism that had characterised previous German thought. Accordingly, they take pains to set out the “premises of the materialist method”. They start, they say, from “real human beings”, emphasising that human beings are essentially productive, in that they must produce their means of subsistence in order to satisfy their material needs. The satisfaction of needs engenders new needs of both a material and social kind, and forms of society arise corresponding to the state of development of human productive forces. Material life determines, or at least “conditions” social life, and so the primary direction of social explanation is from material production to social forms, and thence to forms of consciousness. As the material means of production develop, “modes of co-operation” or economic structures rise and fall, and eventually communism will become a real possibility once the plight of the workers and their awareness of an alternative motivates them sufficiently to become revolutionaries.