Revolutions and the making of the modern state

For most of history rulers justified authority through descent, conquest or divine sanction. The revolutionary claim of the late eighteenth century was that legitimate government rests on the consent of the governed, and that rights belong to people rather than being granted by rulers.

This idea had a long build-up: the constraints imposed on English monarchs, the Enlightenment arguments of Locke, Montesquieu and Rousseau, and the practical experience of self-government in colonies and city republics.

• The American revolution produced a written constitution, separated powers, federalism and judicial review, while leaving slavery intact.
• The French revolution moved much faster and further, abolishing feudal privilege and declaring universal rights, then passing through terror and ending in empire.
• The Haitian revolution was the only successful large-scale revolt of enslaved people to found a state, and it forced the contradiction between universal rights and slavery into the open.

The industrial revolution began in Britain with textiles, coal and steam, then spread. What changed was not only output but the organisation of work: production moved from households to factories, time was measured by the clock rather than the task, and the scale of enterprise grew far beyond family capacity.

The social consequences drove a century of politics: rapid urbanisation, dangerous working conditions, child labour, and the emergence of organised labour movements demanding regulation and the vote. Most modern welfare, safety and education law traces back to this pressure.

Nationalism fused a cultural claim, that a people sharing language and history exists, with a political claim, that such a people should govern itself. It unified Germany and Italy, dissolved multi-ethnic empires, and provided the language anti-colonial movements later used against the very powers that had promoted it.

Nation-states built the machinery we now take for granted: censuses, passports, standardised education, conscription, national currencies and statistics. These tools made populations legible to governments and made mass mobilisation possible, for welfare and for war alike.

Suffrage widened in stages, usually under pressure rather than by gift: property qualifications fell, then working men gained the vote, then women, then in many countries racial barriers were dismantled. Each step changed what politicians had to promise.

By the twentieth century the combination of industrial capacity, national identity and mass participation had produced both extraordinary state capability and the total wars that capability made possible. Understanding the modern state means holding both results together.