The following quotations are taken from:

Marx, The German Ideology, pp. 42-43, 46-47, 48-50, 52-60, 64-66.

“The fact is, therefore, that definite individuals who are productively active in a definite way enter into these definite social and political relations. Empirical observation must in each separate instance bring out empirically, and without any mystification and speculation, the connection of the social and political structure with production. The social structure and the State are continually evolving out of the life-process of definite individuals, but of individuals, not as they may appear in their own or other people’s imagination, but as they really are; i.e. as they operate, produce materially, and hence as they work under definite material limits, presuppositions and conditions independent of their will.

            The production of ideas, of conceptions, of consciousness, is at first directly interwoven with the material activity and the material intercourse of men, the language of real life. Conceiving, thinking, the mental intercourse of men, appear at this stage as the direct efflux of their material behavior. The same applies to mental production as expressed in the language of politics, laws, morality, religion, metaphysics, etc. of a people. Men are the producers of their conceptions, ideas, etc.—real, active men, as they are conditioned by a definite development of their productive forces and of the intercourse corresponding to these, up to its furthest forms. Consciousness can never be anything else than conscious existence, and the existence of men is their actual life-process. If in all ideology men and their circumstances appear upside-down as in a camera obscura, this phenomenon arises just as much from their historical life-process as the inversion of objects on the retina does form their physical life-process.” 46-47

“Life is not determined by consciousness, but consciousness by life. In the first method of approach the starting-point is consciousness taken as the living individual; in the second method, which conforms to real life, it is the real living individuals themselves, and consciousness is considered solely as their consciousness.” 47

“The production of life, both of one’s own in labour and of fresh life in procreation, now appears as a double relationship: on the one hand as a natural, on the other as a social relationship. By social we understand the co-operation of several individuals, no matter under what conditions, in what manner and to what end. It follows from this that a certain mode of production, or industrial stage, is always combined with a certain mode of co-operation, or social stage, and this mode of co-operation is itself a ‘productive force’. Further, that the multitude of productive forces accessible to men determines the nature of society, hence, that the ‘history of humanity’ must always be studied and treated in relation to the history of industry and exchange…. [F]rom the start… there exists a materialistic connection of men with one another, which is determined by their needs and their mode of production, and which is as old as men themselves. This connection is ever taking on new forms, and thus presents a ‘history’ independently of the existence of any political or religious nonsense which in addition may hold men together.” 50

“This fixation of social activity, this consolidation of what we ourselves produce into an objective power above us, growing out of our control, thwarting our expectations, bringing to naught our calculations, is one of the chief factors in historical development up till now.

            (And out of this very contradiction between the interest of the individual and that oof the community the latter takes an independent form as the State, divorced from the real interests of individual and community, and at the same time as an illusory communal life, always based, however, on the real ties existing in every family and tribal conglomeration—such as flesh and blood, language, division of labour on a larger scale, and other interests—and especially, as we shall enlarge upon later, on the classes, already determined by the division of labour, which in every such mass of men separate out, and of which one dominates all the others. It follows from this that all struggles within the State, the struggle between democracy, aristocracy, and monarchy, the struggle for the franchise, etc. etc. are merely the illusory forms in which the real struggles of the different classes are fought out among one another… Further, it follows that ever class which is struggling for mastery, even when its domination, as is the case with the proletariat, postulates the abolition of the old form of society in its entirety and of dominion itself, must first conquer for itself political power in order to represent its interest in turn as the general interest, which immediately it is forced to do. Just because individuals seek only their particular interest, which for them does not coincide with their communal interest, the latter will be imposed on them as an interest ‘alien’ to them, and ‘independent’ of them, as in its turn a particular, peculiar ‘general’ interest; or they themselves must remain within this discord, as in democracy. On the other hand, too, the practical struggle of these particular interests, which constantly really run counter to the communal and illusory communal interests, makes practical intervention and control necessary through the illusory ‘general’ interest in the form of the State.)

            The social power, i.e. the multiplied productive force, which arises through the co-operation of different individuals as it is determined by the division of labour, appears to these individuals, since their co-operation is not voluntary but has come about naturally, not as their own united power, but as an alien force existing outside them, of the origin and goal of which they are ignorant, which they thus cannot control, which on the contrary passes through a peculiar series of phases and stages independent of the will and the action of man, nay even being the prime governor of these.” 53-54

“From the above it is clear that the real intellectual wealth of the individual depends entirely on the wealth of his real connections. Only then will the separate individuals be liberated form the various national and local barriers, be brought into practical connection with the material and intellectual production of the whole world and be put in a position to acquire the capacity to enjoy this all-sided production of the whole earth (the creations of man). All-round dependence, this natural form of the world-historical co-operation of individuals, will be transformed by this communist revolution into the control and conscious mastery of these powers, which, born of the action of men on one another, have till now overawed and governed men as powers completely alien to them.” 55

“This conception of history depends on our ability to expound the real process of production, starting out from the material production of life itself, and to comprehend the form of intercourse connected with this and created by this mode of production (i.e. civil society in its various stages), as the basis of all history; and to show it in its action as State, to explain all the different theoretical products and forms of consciousness, religion, philosophy, ethics, etc. etc. and trace their origins and growth from that basis; by which means, fo course, the whole thing can be depicted in its totality (and therefore, too, the reciprocal action of these various sides on one another.” 58

“This sum of productive forces, capital funds and social forms of intercourse, which every individual and generation finds in existence as something given, is the real basis of what the philosophers have conceived as ‘substance’ and ‘essence of man’, and what they have deified and attacked; a real basis which is not in the least disturbed, in its effect and influence on the development of men, by the fact that these philosophers revolt against it as ‘self-consciousness’ and the ‘Unique.’ These conditions of life, which different generations find in existence, decide also whether or not the periodically recurring revolutionary convulsion will be strong enough to overthrow the basis of the entire existing system. And if these material elements of a complete revolution are not present (namely, on the one hand the existing productive forces, on  the other the formation of a revolutionary mass, which revolts not only against separate conditions of society up till then, but against the very ‘production of life’ till then, the ‘total activity’ on which it was based), then, as far as practical development is concerned, it is absolutely immaterial whether the idea of this revolution has been expressed a hundred times already, as the history of communism shows.” 59