Part Five scales outward into the civilisational deposit: how large accumulations form, transmit, compete, resonate, and collapse, traced through Ancient Greece, India and China, the Islamic Golden Age, the English Revolution, the French Revolution, the Enlightenment, and the Liberal Democracies that are the living result of all of it.

History arrives already flattened, and by something harder to argue with than a diagnostic category. It arrives as narrative, and narrative needs a proximate cause. Accumulation has no scene; a hundred-year lag cannot be filmed. Ken Burns's The American Revolution explains the Revolution almost entirely from inside the colonies — taxation, Boston, personalities, grievance, escalation. What is barely present is the century of English accumulation the colonists were drawing on: Coke insisting in 1608 that the king is subject to the law, the Putney Debates, the regicide, 1689, Locke. They were not improvising a political vocabulary. They were deploying one that had been laid down, tested at the cost of a civil war, and left available.

This is not a fault peculiar to Burns; it is structural to the form, and the observation is not new. Bernard Bailyn showed the colonists arguing in a borrowed English radical Whig idiom in 1967, and J. G. A. Pocock ran the same line from Florence through English republicanism to Philadelphia in 1975. What that reading has never had is a process, which is why it keeps losing to the version with a scene in it. Two questions organise the chapters, and they turn out to be the same question at different magnifications: the great man question, and the question of environment against choice. Machiavelli put it more plainly than anyone since. Fortuna governs perhaps half of what we do and leaves the rest to us; the flood will come, but the channels dug beforehand decide where it runs. Formative conditions are fortuna. Choice is virtù.

These chapters draw on five analytical traditions — Diamond's geographical and biological initial conditions, Acemoglu and Robinson's institutional pathway, Ferguson's specific advantages, Pinker's long decline in violence, and the corrective Graeber and Wengrow press: that the same conditions produced different paths, and no outcome was written in the geography. What none of them supplies is the formal account of how a civilisation couples to personal integrals — the pathway by which historical forces enter individual parameter sets, are modified by what they find there, and return to the deposit enriched or degraded.

History here functions as data, not doctrine. It is one instrument applied to the record, and an instrument is only worth using if it can be wrong: where the account aligns with what historians have established, the alignment is the argument; where it does not, the gap is the finding. Nor do the chapters select for importance, power, population or duration. If they did, Rome would be a chapter and the Athenian symposion a footnote. They select for how legibly a thread shows the process working, and the most familiar threads are the ones it costs least to leave out, because the reader arrives already holding them.