Part 3 built the stage: the transformations that made a science of society necessary (3.2), and the three people who first tried to found one (3.3). Part 4 takes the minds who actually built the theories that everything since has been replying to.

We begin with the one whose framework every rival still has to answer.

The idea, in plain words

The word materialism here has nothing to do with liking expensive things. It is a technical opposition to idealism — the philosophical position that ideas, spirit or consciousness are the primary reality and the driver of change.

Marx's formulation is famous and worth having exactly:

"It is not the consciousness of men that determines their being, but, on the contrary, their social being that determines their consciousness." — A Contribution to the Critique of Political Economy (1859), Preface

Read it slowly, because the whole framework is compressed in it. Social being — where you stand in the actual, practical business of producing and reproducing life; whether you own land or work it, own a factory or work in it. Consciousness — what you believe, what seems obvious to you, what strikes you as fair or natural or absurd.

Marx is saying the arrow runs from the first to the second. Not that people are stupid or insincere, but that the position you occupy in the productive order shapes, profoundly and mostly invisibly, the way the world looks to you from there.

Where the idea comes from: the premises

In The German Ideology, written with Friedrich Engels in 1845–46 and not published in full until 1932, Marx sets out the starting points. They are almost aggressively obvious, and that is the point.

First premise: living human beings. Not Man in the abstract, not Spirit, not the Idea. Actual people with bodies that need feeding.

Second: the first historical act. Before people can make history, philosophy, politics or art, they must be able to live — and to live they need food, drink, shelter and clothing. The production of the means to satisfy these needs is therefore the first historical act, and it is not a thing that happened once at the dawn of time. It has to be performed, every day, for ever.

Third: needs generate new needs. Satisfy the first need and the very act of satisfying it — the tool you made, the field you cleared — creates new needs. This is a motor. History does not need an external push.

Fourth: people reproduce. Families, generations, populations. The making of new life is as much a productive relation as the making of bread.

Fifth — and here is the turn: production is always social. No one produces alone. Production always involves a definite mode of cooperation, a definite way of dividing up the work and its product. That way of cooperating is itself a social relationship, and it is not chosen freely by each generation; it is inherited.

Forces and relations of production

Two terms carry most of the analytical weight. Get these straight and the rest of Marx becomes navigable.

The forces of production (Produktivkräfte) — everything that goes into the actual physical business of producing. Tools, machines, factories, land, raw materials, energy sources, transport, technical knowledge, and human labour power with its accumulated skill. Roughly: what you produce with.

The relations of production (Produktionsverhältnisse) — the social relationships people enter into in order to produce, and above all the property relations: who owns the forces of production, who works them, and how the product is distributed. Roughly: who owns what, and who works for whom.

Some examples make the pair concrete.

Society Forces of production Relations of production
Ancient Rome Ploughs, irrigation, latifundia estates, hand tools Slave-owner and slave; the worker is property
Medieval Europe Heavy plough, three-field rotation, watermills Lord and serf; bound to the land, owes labour and dues
Industrial Britain Steam, factories, railways, power looms Capitalist and wage labourer; formally free, owns no means of production

The mode of production

Put forces and relations together and you have a mode of production — Marx's name for a whole type of economic organisation. Primitive communal, ancient (slave), feudal, capitalist, and — projected, not observed — socialist and communist.

This is the unit of historical analysis. Not the nation, not the century, not the reign: the mode of production. Lesson 4.1.2 takes the concept apart properly, along with the base/superstructure image that goes with it.

The engine: when forces outgrow relations

Here is Marx's actual mechanism of change, and it is more specific than "the economy causes things."

Forces of production develop. Techniques improve, tools get better, knowledge accumulates, productivity rises. This happens more or less continuously, because people keep trying to make the work easier.

Relations of production are much stickier. They are embedded in law, in custom, in political power, in what everyone thinks is natural — and they are defended by whoever benefits from them, which is generally whoever has the power to defend them.

So the two drift apart. The relations that once helped the forces develop start to hold them back. Marx's word is Fesseln — fetters, chains.

"At a certain stage of development, the material productive forces of society come into conflict with the existing relations of production... From forms of development of the productive forces these relations turn into their fetters. Then begins an era of social revolution." — Preface, 1859

The full formulation deserves its own box, because the qualifications inside it are what separate Marx from the crude version of Marx.

Go deeper

The two Marxes on how tight the determination is

There is a real tension in Marx, and honest teaching has to show it rather than smooth it over.

The tight version appears in the 1859 Preface — a text written under Prussian censorship, compressed, and read ever after as the official statement. Relations "correspond" to forces. The economic base "conditions" the whole superstructure. Consciousness is "determined" by social being. Read alone, it sounds like a machine in which people are cogs.

The loose version appears everywhere Marx does actual historical analysis. The Eighteenth Brumaire of Louis Bonaparte (1852) is a hundred pages on a French political crisis in which peasants, journalists, generals, the lumpenproletariat, the memory of Napoleon and the personal ineptitude of Louis Bonaparte all do real causal work. Nothing about it reads like a machine. And its most quoted line is the best one-sentence statement of the structure/agency problem anyone has produced:

"Men make their own history, but they do not make it as they please; they do not make it under self-selected circumstances, but under circumstances existing already, given and transmitted from the past."

Both halves are load-bearing. Men make their own history — people act, choose, organise, fight, and their action is real causation, not froth on a wave. But not under circumstances of their own choosing — and the circumstances are inherited, structured, and mostly not visible as choices at all.

Engels, after Marx's death, spent considerable effort trying to correct the mechanical reading. In a letter to Joseph Bloch in 1890:

"According to the materialist conception of history, the ultimately determining element in history is the production and reproduction of real life. More than this neither Marx nor I have ever asserted. Hence if somebody twists this into saying that the economic element is the only determining one, he transforms that proposition into a meaningless, abstract, senseless phrase."

He goes on to say that political forms, legal forms, religious and philosophical theories all "exercise their influence upon the course of the historical struggles and in many cases preponderate in determining their form."

The stages problem

Marx sketched a sequence of modes of production, and it has caused enormous trouble.

In the 1859 Preface he lists "Asiatic, ancient, feudal and modern bourgeois" modes as "epochs marking progress in the economic development of society." Read as a universal ladder every society must climb, this is exactly the stadial theory that 3.1.6 and 3.3.1 warned about — with Europe, once again, at the top.

Three things are worth knowing.

First, Marx explicitly denied the ladder reading. In an 1877 letter concerning a Russian critic, he objected to having his sketch of Western European development "metamorphosed into a historico-philosophic theory of the general path every people is fated to tread." In his late correspondence with the Russian revolutionary Vera Zasulich (1881), he went further, drafting several replies exploring whether the Russian peasant commune might pass directly to a communal form without going through capitalism. He never settled the question, but he took it seriously — which a man committed to a universal ladder could not have done.

Second, the "Asiatic mode of production" is the weakest thing in the framework. It was built on limited and largely colonial-era sources; it posits stagnant village societies with no internal dynamic under a despotic state; and it fed directly into the imperial ideology 3.2.7 examined. Marx's early journalism on India contains passages that are straightforwardly Orientalist, and some that endorse British rule as an unwitting instrument of progress. His later views on Ireland and on India shifted considerably — by the 1860s and 70s he wrote about Irish national liberation as a precondition of English working-class emancipation, and grew far more scathing about colonial plunder. But the early material is there, it is bad, and it should not be hidden. Part 6 returns to it.

Third, twentieth-century orthodoxy made the ladder official. The five-stage scheme — primitive communism, slavery, feudalism, capitalism, socialism — was codified in the Soviet Union and taught as doctrine. It is more Stalin's than Marx's, and historians of Asia, Africa and Latin America spent decades demonstrating that actual histories do not fit it.

What historical materialism is actually good for

Set aside prophecy and the philosophy of history. As a research programme, historical materialism generates a set of questions that repeatedly turn out to be productive, whatever you conclude:

Who owns the means of production here? Land, capital, machinery, data, platforms, intellectual property.

Who has to sell their labour to live, and on what terms?

Where does the surplus go? Something is produced beyond what producers consume. Follow it.

Whose interests do the prevailing "obvious truths" serve? Not "who invented them cynically" — usually nobody did — but who benefits from their being obvious.

What technical capacities exist that current arrangements prevent from being used?

Note that you do not have to be a Marxist to find these questions useful. They are now so thoroughly absorbed into economic sociology, historical sociology, development studies and the sociology of work that people ask them without knowing whose they are. That is the strongest evidence of a theory's success: it stops being visible.

Why it matters

It supplies sociology's most powerful "look underneath" instrument. The sociological imagination (1.1.1) says private troubles have public causes. Historical materialism says: to find the public cause, follow production, ownership and surplus. It is a specific, checkable direction to look in — which is more than most grand theories offer.

It explains where "the way things are" comes from. Every society's sense of the natural is historically produced, and one of the strongest producers is the arrangement by which that society lives. This is the ancestor of the sociology of knowledge (5.15) and of ideology critique (4.1.7).

It makes change explicable rather than miraculous. Not great men, not the spirit of the age: an identifiable tension between what a society can produce and the rules governing production.

And it set the agenda that Durkheim and Weber were, in part, answering. Durkheim's insistence that moral facts are not reducible to economic ones (4.2), and Weber's demonstration that a religious ethic could be a causal factor in capitalism's emergence (4.3.7), are both arguments with Marx. You cannot follow Part 4 without him.