When ideas overthrew kings.

The Enlightenment (c. 1685–1815) applied reason to politics, economics, and religion. Locke’s natural rights (life, liberty, property) and Rousseau’s social contract (legitimate government from the general will) supplied the vocabulary of revolution. Voltaire pushed for tolerance and freedom of speech. Montesquieu’s separation of powers shaped the U.S. Constitution. Smith’s Wealth of Nations (1776) launched modern economics. Salons in Paris and coffeehouses in London circulated ideas. Crucially, women like Mary Wollstonecraft and Olympe de Gouges extended Enlightenment logic to gender.

Nationalism—loyalty to the nation rather than the monarch—emerged from the Enlightenment and the Atlantic Revolutions. By the 19th century it drove German and Italian unifications, Greek independence from the Ottomans, and anti-colonial movements in Latin America. Nationalism was double-edged: it built democratic states but also fueled imperialism, ethnic cleansing (Ottoman Armenians, eventually), and 20th-century totalitarianism. Print culture (Anderson’s “imagined communities”), mass schooling, and military conscription forged national identity from above.

The American Revolution (1775–1783) created the first modern republic outside Europe. The French Revolution (1789) declared the Rights of Man, dethroned a king, and produced Napoleon. The Haitian Revolution (1791–1804) was the only successful slave revolt in modern history; Toussaint Louverture led it. Latin American independence (1810s–1820s) under Bolívar and San Martín ended Spanish-Portuguese rule. Each revolution drew on Enlightenment ideas; each had different social compositions and outcomes. Haiti’s revolution was the most radical.

Common causes: Enlightenment ideas, fiscal crises (post-Seven Years’ War debt), Napoleon’s disruption of colonial control. Different local contexts: settler-colonial elites (American), bourgeois revolution against monarchy (French), enslaved population (Haitian), Creole elite vs. peninsular Spanish (Latin American). Each revolution’s outcome reflected its social base: U.S. preserved slavery and elite rule; France oscillated; Haiti abolished slavery and became Black-led; Latin America replaced Spanish elites with Creole ones, leaving slavery and racial hierarchy mostly intact.

Britain industrialized first because it had: coal close to iron, navigable rivers and canals, colonial markets, agricultural surplus from enclosure, capital from Atlantic trade, and a relatively stable government. Textiles came first (the spinning jenny, the water frame, the steam-powered loom); the cotton-gin made U.S. cotton economically viable. Watt’s improved steam engine (1769) generalized industrial power: pumping mines, then driving factories, then railways and ships. The transformation was structural: from rural cottage to urban factory, from artisan to wage-laborer.

Industrialization spread unevenly. Belgium, France, and the German states industrialized through the early-to-mid 1800s, building railways and steel industries. The U.S. industrialized after the Civil War. Japan’s Meiji Restoration (1868) launched state-led industrialization, the only non-Western successful case until much later. Russia industrialized late and slowly under Witte’s reforms. Latin America, Africa, and most of Asia did not industrialize but were integrated into the global economy as raw-material exporters—creating the divergence in living standards still with us today.

The First Industrial Revolution (c. 1760–1840) ran on steam, iron, and textiles. The Second (c. 1870–1914) ran on steel (Bessemer process), electricity (Edison, Tesla), chemicals, and the internal combustion engine. Each wave compounded productivity and reshaped daily life. By 1900, electricity was lighting cities; the telegraph and telephone connected continents; railways and steamships moved goods globally; cars and (soon) airplanes promised to transform mobility. Each technology created winners and losers.

Britain industrialised almost entirely on private capital, with a government that mostly stayed out of the way. Nearly everyone who came afterwards needed the state instead. Japan’s Meiji government, from 1868, built railways, telegraphs and model factories and then sold them on to private conglomerates, after the Iwakura Mission of 1871–1873 toured Europe and the United States to decide what was worth copying. Egypt under Muhammad Ali, governor from 1805, built state textile mills and armouries funded by trade monopolies — and lost the protection those monopolies gave once British pressure and the 1838 Anglo-Ottoman commercial treaty forced the tariffs open. In Russia, Sergei Witte financed the Trans-Siberian Railway in the 1890s with state bonds and foreign capital. The pattern is the point: industrialising FIRST could be private; industrialising to CATCH UP needed the state, and needed enough sovereignty to defend the attempt.

Industrialisation did not just change how things were made; it changed how businesses were owned and paid for. The limited-liability corporation let an investor risk only what they had put in, which made it possible to raise sums no single family could, and stock markets let those shares be bought and sold by strangers. The result was firms that outgrew any one country: the Hong Kong and Shanghai Banking Corporation, founded in 1865, financed trade across Asia from two ports at once, and Unilever, based in England and the Netherlands, ran plantations and factories in British West Africa and the Belgian Congo. The same century invented the modern consumer alongside the modern firm — interchangeable parts made goods identical and cheap, department stores followed (the Bon Marché, Paris, 1852), mail-order catalogues carried the same goods to farmhouses far from any shop, and advertising grew to fill the gap between a maker and a buyer who would never meet.

Reactions ranged from radical to reactionary. Marx and Engels argued capitalism would inevitably collapse from its own contradictions, replaced by socialism. Earlier utopian socialists (Owen, Fourier) tried to build alternative communities. Romantic poets and artists rejected industrial ugliness for nature and emotion. Trade unions and the labor movement built worker power. Conservative governments responded with expanded suffrage (Britain’s Reform Acts), social insurance (Bismarck’s Germany), and factory regulation. Industrial society would generate the political ideologies of the 20th century.

Industrial society swapped a hierarchy of birth for one of capital. A middle class of factory owners, managers and professionals rose alongside a working class that had to sell its labour by the hour. Cities grew faster than anyone could build for them: Manchester, Liverpool and the mill towns filled with people arriving quicker than housing, drains or clean water could be provided, and cholera and a life expectancy well below the countryside followed. The working day itself became a political question. Britain’s Factory Act of 1833 barred children under nine from textile mills and capped hours for those aged nine to thirteen, and later acts widened the limits. Almost every improvement arrived as legislation decades after the problem appeared — and that delay is itself an argument about who held power.

Paid work also moved out of the home, and family structure moved with it. Where a household had once produced together, wages were now earned outside it and brought back — which changed who held money, who was counted as working, and what childhood was for.

The unit closes with an argument rather than new content: how far did the world of 1900 differ from the world of 1750? State a criterion first — say what would count as transformation — then test the evidence against it. For change: production left the household for the factory, steam and rail collapsed distance, two new classes organised themselves politically, and states took on schooling, sanitation and factory inspection. For continuity, which scores better because fewer students reach for it: in 1900 farming still employed most of the world’s people, and most of the world had not industrialised at all — this was a regional event long before it was a global one. Empires still ruled most of Africa and Asia, and women remained legally subordinate almost everywhere. The comparisons are your evidence: Britain industrialising through private capital against Japan doing it through the Meiji state, or industrial cores against raw-material peripheries.