The Grundrisse is the vast rough draft of 1857–58 out of which the whole of the mature critique of political economy grew — the workshop notebooks in which Marx first worked out, at speed and for himself, the categories that Capital would later present in finished form. Because it is a draft, it says many things more explicitly, more speculatively, and more philosophically than the published work: the Hegelian scaffolding is visible, the historical and anthropological horizon is wider, and several of Marx's most far-reaching passages — the fragment on machines, the pre-capitalist formations, the reflections on disposable time and the individual — exist only here. The 1857 Introduction is the methodological gateway to all of it. Written first but never published by Marx (he judged it premature to "anticipate results still to be proved"), it lays out how the critique will proceed: what "production in general" can and cannot mean, how production, distribution, exchange, and consumption form a single articulated totality rather than a linear sequence, and — in its most influential section — the method of rising from the abstract to the concrete, the logic by which thought reconstructs a concrete whole out of simple determinations. This brief reconstructs the Introduction's argument and carries its load-bearing formulations, which are the charter for reading everything that follows in the notebooks and in Capital.

Marx opens by demolishing the "Robinsonades" of classical economy — the fiction of the isolated individual producing alone, from which Smith and Ricardo begin. There is no production outside society; the individual producer is always already a social being, and the eighteenth-century image of the self-sufficient individual is itself a historical product, the ideological reflex of the very society that dissolves all older communal bonds. Production in general is a useful abstraction, but only if one remembers that it never exists as such — real production is always production at a determinate stage of society.

The heart of the section is the relation among the four moments. Against the textbook order (production → distribution → exchange → consumption, each a separate sphere), Marx argues that the four are internally related: production is immediately consumption (of raw materials, of labour-power) and consumption is immediately production (of the human being, of new needs); distribution is not a neutral sharing-out that follows production but is itself determined by the production relations (the distribution of the agents of production into classes precedes and structures the distribution of products); exchange mediates between them. But the four are not simply identical. They form an articulated whole in which one moment governs.

The identity claims come first, stated with full dialectical explicitness before Marx qualifies them.

Production, then, is also immediately consumption, consumption is also immediately production. Each is immediately its opposite. But at the same time a mediating movement takes place between the two. Production mediates consumption; it creates the latter’s material; without it, consumption would lack an object. But consumption also mediates production, in that it alone creates for the products the subject for whom they are products.

Marx, Grundrisse, Introduction, page 91.

On distribution the notebook is just as categorical: the forms of distribution are not an autonomous sphere but the obverse of the relations of production themselves.

The structure [Gliederung] of distribution is completely determined by the structure of production. Distribution is itself a product of production, not only in its object, in that only the results of production can be distributed, but also in its form, in that the specific kind of participation in production determines the specific forms of distribution, i.e the pattern of participation in distribution.

Marx, Grundrisse, Introduction, page 95.

And behind the distribution of products stands a prior distribution that belongs to production itself.

In the shallowest conception, distribution appears as the distribution of products, and hence as further removed from and quasi-independent of production. But before distribution can be the distribution of products, it is: (1) the distribution of the instruments of production, and (2), which is a further specification of the same relation, the distribution of the members of the society among the different kinds of production. (Subsumption of the individuals under specific relations of production.)

Marx, Grundrisse, Introduction, page 96.