The Gambler Who Owned France

Money & Markets · Paris, 1716–1720 · John Law

TL;DR: A Scottish duelist who escaped a death sentence taught France to use paper money, took over its national debt, its colonial trade and its tax collection, and for a few months in 1720 was arguably the most powerful private individual in European history. It lasted less than a year.

What actually happened

Law's System merged a note-issuing bank with the Mississippi Company until shares, currency and state debt were one self-referential machine: print notes to buy shares, watch shares rise, print more. 'Millionaire' entered the language on the Rue Quincampoix. As Controller-General, Law effectively ran the French economy.

When holders tried to convert paper back into coin, the System needed exits it didn't have. Law capped, devalued, forbade gold hoarding, and each decree burned trust faster. By December 1720 he fled France with almost nothing; the state carried the wreckage and a lasting French suspicion of paper money and central banks.

Ferguson's verdict, which the episode adopts: not a simple swindler, but a monetary theorist a century early, with a gambler's tolerance for the downside of being wrong.

The play to remember

A currency is a story everyone agrees to keep telling. Print the story faster than the belief and both stop.

Sources & fact flags: Ferguson, The Ascent of Money; Murphy, John Law: Economic Theorist and Policy-Maker.

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