The classical inheritance was carried, argued over and transformed for a thousand years. Then, between roughly 1500 and 1750, European thinkers produced most of the modern vocabulary for talking about society: power analysed apart from virtue, the state as an artificial construction, inequality as a human product rather than a natural fact, and laws understood as having social causes.

That last move is the one that matters most here, and the man who made it is the one Durkheim regarded as the real beginning.

Before: Augustine and Aquinas

Briefly, because the medieval contribution is real and mostly indirect.

Augustine (354–430) divided humanity between the City of God and the earthly city, oriented respectively to love of God and love of self. The earthly city is necessary and fallen; political order restrains sin rather than realising virtue. The sociological residue: a durable strain of realism about political order as constraint rather than perfection — which reappears in Hobbes, in Machiavelli's assumptions about human motives, and, secularised, in a great deal of conflict theory.

Thomas Aquinas (1225–1274) drew on the newly recovered Aristotle — via the Arabic transmission described in 3.1.4 — to argue that human beings are naturally social and political, that political authority is therefore natural rather than merely a remedy for sin, and that human law derives its force from natural law accessible to reason. Two residues: society understood as natural rather than merely conventional, and a universalistic standard against which particular laws can be judged, which runs into modern rights thinking and into 2.1.8's search for criteria that travel.

Machiavelli: power as it is

Niccolò Machiavelli (1469–1527), a Florentine official who lost his position when the republic fell, wrote The Prince in 1513 and the far longer Discourses on Livy in the same years.

The famous move. He announces that he will write about what rulers actually do rather than what they ought to do, because "a man who wishes to profess goodness at all times will come to ruin among so many who are not good." Political conduct is therefore to be judged by its effects, and the qualities that preserve a state may not be the qualities a good man would possess.

Note precisely what is sociological here: the separation of an analytic question (what maintains power?) from an evaluative one (what is virtuous?). That is the same separation 1.3.3 called value-freedom and 1.5.2 called debunking, and it is why Machiavelli is claimed as an ancestor by realists of every stripe.

Virtù and fortuna. Virtù is not virtue but capacity — energy, skill, decisiveness, the ability to act well in circumstances. Fortuna is contingency: what circumstances happen to present. Political outcomes arise from the interaction, and the successful actor is the one whose disposition matches the times. There is a genuine theory of agency-within-constraint here (1.3.1), and a genuine account of why the same person succeeds in one period and fails in another.

The Discourses, which are more interesting and less read. Machiavelli the republican argues that Rome's greatness came from its internal conflict: the tumults between the plebeians and the patricians, far from weakening the republic, produced its laws and its liberty, because each class checked the other's ambition.

Read that against 1.3.4. It is an argument that conflict is productive of order — that a society without contending groups is not more harmonious but more easily dominated — and it anticipates Simmel's and Coser's functions of conflict (5.2) by four centuries.

The contract tradition

Three thinkers, one shared device, three different conclusions. The device: imagine human beings without political authority, and ask what would follow.

Thomas Hobbes (1588–1679), writing Leviathan in 1651 during and after the English civil wars. In the state of nature, with no common power, human beings — roughly equal in capacity, competing for the same goods, and rationally fearing each other — fall into a "war of every man against every man," in which there is no industry, no culture, no society, and life is "solitary, poor, nasty, brutish, and short." The remedy is a covenant by which each surrenders the right of self-governance to a sovereign whose power must be undivided and unchallengeable.

You met this in 1.2.1 as the canonical statement of the problem of order. Add here what makes it modern: order is an artefact. It is constructed by human beings out of fear and reason, not given by nature or God. Once that is said, the question of how societies actually cohere becomes available for investigation — and every answer in 1.2.1 is a reply to Hobbes.

John Locke (1632–1704). The state of nature is not war but inconvenience: there is a natural law, but no impartial judge to apply it. Government is therefore instituted by consent for the protection of life, liberty and property, holds power in trust, and may be dissolved if it breaks the trust. Two residues for sociology: a theory of property as arising from labour mixed with nature, which Marx would engage at length; and An Essay Concerning Human Understanding's argument that the mind begins without innate ideas — the ancestor of every claim in 2.3.1 that human beings are formed by experience.

Jean-Jacques Rousseau (1712–1778) is the most sociological of the three, and the Discourse on the Origin of Inequality (1755) is a text that could sit in Part 8 with very little adjustment.

His argument: human beings in a natural condition are neither good nor wicked but self-sufficient and largely solitary, moved by amour de soi — simple self-preservation — and by pity. Inequality among them is trivial: differences of strength and age.

Then, through settlement, agriculture and metallurgy, people begin to live together, compare themselves, and require each other's regard. Amour propre appears: the desire to be esteemed relative to others, which is inherently competitive and insatiable. And with the division of labour comes property. Rousseau's famous sentence: "The first man who, having enclosed a piece of ground, bethought himself of saying This is mine, and found people simple enough to believe him, was the real founder of civil society."

Three sociological claims are packed into this, and all three are still live.

Inequality is a social product, not a natural fact — differences of wealth, rank and power arise from arrangements, and Rousseau distinguishes them sharply from natural differences. That is 1.2.2's founding distinction.

Amour propre is a theory of recognition: the claim that once people live together, their sense of themselves depends on others' regard, which becomes a competitive good. This runs directly into Cooley (2.3.2), into Veblen's conspicuous consumption (4.6), into Bourdieu's symbolic capital (2.1.13), and into Honneth's struggle for recognition (5.6).

And the "chains" line. "Man is born free, and everywhere he is in chains" opens The Social Contract (1762) — where Rousseau's answer is the general will: legitimate authority arises when citizens legislate collectively for the common good, so that in obeying the law they obey themselves. The concept is genuinely difficult, has been read as both radically democratic and dangerously authoritarian, and is worth knowing as an unresolved problem rather than a settled doctrine.

Go deeper

Vico, briefly and importantly

Giambattista Vico (1668–1744), a Neapolitan professor of rhetoric, published the New Science in 1725. Almost unread in his lifetime, he matters for one principle.

Verum ipsum factum — the true is the made. We can have genuine knowledge of the social and historical world, Vico argued, in a way we cannot of nature, because we made it. Human institutions — languages, laws, myths, customs — are human products, and can therefore be understood from the inside.

That is a claim about the possibility and the method of social science, and it is the direct ancestor of Weber's verstehen (1.3.3), of the interpretive tradition, and — read a certain way — of 2.4.1's whole argument. Vico also proposed a cyclical account of nations passing through ages of gods, heroes and men, with a ricorso or return, which places him alongside Ibn Khaldun and Polybius (1.2.3).

What the contract tradition is and is not

An essential clarification, because this is the most common misreading in the whole lesson.

The state of nature is not a historical claim. Neither Hobbes nor Locke nor Rousseau is offering an anthropology of early humanity — and where Rousseau comes closest, he explicitly says he is setting the facts aside to reason about what must be. It is an analytical device: strip away political authority in thought, and see what has to be explained.

Why this matters. Read as history, contract theory is simply false: there is no evidence of pre-social solitary humans, and everything in 2.3.1 says there could not be. Read as a device, it does something valuable — it makes political authority require justification rather than being a given, and it makes the problem of order visible as a problem.

The sociological criticisms are nonetheless serious and worth knowing: the "individuals" of the state of nature are suspiciously like seventeenth-century European property-holders, complete with their motives; the device makes society look like an aggregation of pre-formed individuals, which is exactly the error 1.3.5 and 2.3.1 dismantle; and feminist scholarship — Carole Pateman's The Sexual Contract is the standard reference — has argued that the social contract presupposes a prior and unexamined settlement about the subordination of women, since the "individuals" who contract are heads of households.

The line into sociology

To be concrete about the inheritance, since this Topic is about origins.

From Machiavelli: the analysis of power apart from virtue; conflict as productive of order. From Hobbes: the problem of order as a problem; society as artefact. From Locke: property from labour; the mind as formed by experience. From Rousseau: inequality as a social product; recognition as a social need; the general will as an unresolved problem about collective self-rule. From Montesquieu: institutions as socially caused; comparative method; typologies with animating principles; and — through Durkheim's thesis on him — a direct line into the discipline's self-understanding. From Vico: we can know society because we made it.

Every one of those is a component of Parts 4 and 5. This is the toolbox arriving.

Why it matters

It gives you the origin of the problem of order as a problem. After Hobbes, cohesion cannot be assumed. Everything in 1.2.1 is an answer to a question this period made askable.

It gives you inequality as a research object. Rousseau's distinction between natural and social inequality is the founding move of Part 8, and his amour propre is the founding move of every later theory of status, recognition and conspicuous display.

It gives you the comparative method with a causal claim attached. Montesquieu's "spirit of the laws" — institutions standing in determinate relations to their conditions — is the programme Durkheim and Weber would execute.

And it shows the discipline's founding entanglements. The same period, and in Montesquieu's case the same book, produced comparative social science and Oriental despotism. That is not a footnote to the history of sociology; it is the reason Part 6 is a Part rather than a chapter.