John Law Invented Paper Money and Destroyed a Currency With It
A Scottish economist convinced France to replace metal coinage with paper notes backed by a trading company. The scheme collapsed in 1720 and shaped French financial attitudes for a century.
The Problem He Was Solving
France after Louis XIV carried enormous debt and a shortage of metal coinage. John Law, a Scottish economist and gambler, argued that money need not be metal. What mattered was that it circulate and support commerce.
Paper notes, he argued, could serve better than gold because supply could be adjusted to the needs of trade rather than constrained by how much metal existed. This anticipated ideas that became mainstream centuries later, which is why he is genuinely important rather than merely a cautionary figure.
The Structure
Law established a bank authorised to issue notes, and separately obtained control of a company holding trading rights to French territories in North America, commonly known as the Mississippi Company.
The company acquired further monopolies and eventually took on substantial French government debt in exchange for shares, similar in structure to the contemporaneous South Sea arrangement in Britain.
The decisive step was merging the bank with the company. The institution issuing the currency and the company whose shares were being sold became a single entity.
Once the note issuing bank and the speculative company were combined, confidence in the shares and confidence in the money became the same question.
Why That Was Fatal
Share prices rose enormously, driven by expectations about colonial wealth that never materialised, and supported by the bank lending notes to people buying shares.
That is a closed loop. The bank printed notes, the notes bought shares, rising share prices justified more lending, and more notes were printed. Each element supported the others and none rested on anything external.
When shareholders began converting gains into metal coin, the bank could not honour the notes. Attempts to prohibit holding gold and to devalue the notes by decree destroyed confidence entirely. The shares collapsed, the notes became worthless, and Law fled France.
The Long Consequence
The episode left France deeply suspicious of paper money and of banking institutions for generations. That contributed to slower development of French financial markets relative to Britain, which had experienced its own bubble in the same period but retained its banking system.
The comparison is instructive. Britain's South Sea Bubble was severe and did not destroy the Bank of England, because the note issuing institution was separate from the speculative company. France merged them, so the failure of one destroyed the other.
What Was Actually Right
It is worth being fair to the underlying idea. Modern economies do use paper money not backed by metal, and central banks do adjust money supply to economic conditions. Law's core insight was correct.
What he lacked was the institutional structure that makes it work: a central bank independent of commercial ventures, constrained in how much it issues, and credible in maintaining value. The idea was sound and the governance was absent.
The Bottom Line
Law was right that money need not be metal and wrong to merge the money issuer with a speculative company. Separating the institution that issues currency from ventures that need the currency to rise is the whole lesson.