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Great Divergence

Patrick O'Brien

British economic historian (b. 1932), emeritus at the London School of Economics and at All Souls College, Oxford. Trained at LSE and Oxford. Among the most prolific and influential economic historians of the late 20th century, with a remarkable range across British 18th- and 19th-century economic history, comparative state-finance history, and global economic history of empire and trade.

Intellectual program

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O’Brien’s career-long intellectual program has been putting the state back at the center of economic history. His work on British 18th-century taxation (“The Political Economy of British Taxation, 1660–1815”, Economic History Review 1988) was foundational for the fiscal-military-state framework that John Brewer would synthesize at book length the same year. His subsequent comparative work has extended the framework into a global comparative project, asking how British state capacity differed from French, Spanish, Dutch, Ottoman, Mughal, and Qing equivalents — and arguing that the British case represents a comparative outlier whose economic consequences (cheap state borrowing, naval dominance, infrastructural state) underwrote everything else. His “Fiscal Exceptionalism” thesis (2001 LSE working paper and subsequent papers) is the most developed comparative statement.

O’Brien has also been one of the most measured and important critics of the exaggerated version of the Williams thesis — the claim that Atlantic slave-trade profits drove British industrialization. His “The Costs and Benefits of British Imperialism 1846–1914” (Past & Present, 1988) was a pioneering quantitative accounting of imperial rents, arguing that the British empire was a substantial fiscal burden on the British taxpayer at least as much as a source of net economic gain — a finding that has been refined but not overturned in subsequent work. He has been careful to distinguish this skeptical empirical claim from any normative position about the moral significance of empire, slavery, and coercion; he has argued throughout that empire’s economic consequences are real but smaller than the polemical literature has suggested, while accepting that its moral weight is independent.

A third strand of O’Brien’s work has been on long-run quantitative reconstruction — in particular long British economic data series and the methodological foundations of cliometric history. He has been a leader of the global-economic-history community at the LSE and a long-running editor of the Cambridge Economic History series.

Reception and contestation

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O’Brien is one of the most-cited economic historians in the field, with a particular standing as a senior arbitrator across the IR/GD debates. His comparative-state-capacity framework is broadly accepted; his careful skepticism of the strong Williams thesis has been one of the principal empirical anchors against which the modern revival (Inikori, Beckert) has had to argue. He is generally regarded as a consummate empiricist whose conclusions track the evidence even when they cut against political or rhetorical fashion.

Associated positions

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Key works

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  • “The Political Economy of British Taxation, 1660–1815” (Economic History Review, 1988).
  • “The Costs and Benefits of British Imperialism 1846–1914” (Past & Present, 1988).
  • “European Economic Development: The Contribution of the Periphery” (Economic History Review, 1982).
  • “Fiscal Exceptionalism: Great Britain and Its European Rivals from Civil War to Triumph at Trafalgar and Waterloo” (LSE Working Paper, 2001).
  • “The Reconstruction, Rehabilitation and Reconfiguration of the British Industrial Revolution as a Conjuncture in Global History” (Itinerario, 2010).
  • Edited and contributed to numerous volumes including The Cambridge History of Britain, The Atlantic in Global History, and the Oxford History of the British Empire.