The Forgotten History of Paper Money: From Tang Dynasty Promissory Notes to Modern Fiat

The schoolroom story of money goes from barter to commodity money to coinage to paper money to digital ledgers, with each step presented as a natural improvement on the previous. The reality is that paper money is a deeply unnatural invention that took most of human civilization to arrive at, was repeatedly rejected after being adopted, and required specific institutional preconditions that were not present in most of the world for most of history. The 1200-year history of paper money is the slow social construction of a counter-intuitive proposition: that printed paper, backed only by trust in an issuer, can function as a medium of exchange.

This post covers Tang dynasty feiqian as the origin moment, the Song-Yuan paper currency systems and their inflationary collapses, the European reception of the idea via Marco Polo, the late-medieval Italian banking innovations that prefigured paper currency, John Law's catastrophic French experiment of 1716-1720, the gradual rehabilitation through 19th-century commercial banks and central banks, the gold standard and its abandonment in 1971, and the present moment of fiat currency that has lasted 55 years without civilizational collapse.

Tang dynasty feiqian

The first paper money was not currency but a logistical instrument. Around 800 CE, during the Tang dynasty, merchants traveling between provinces with copper coinage faced a serious problem: the weight. A cargo of 10,000 coins weighed roughly 30kg and was a target for bandits. The solution was the feiqian, "flying money" — a deposit certificate issued by a regional government office that could be redeemed at the destination office for the deposited coinage. The merchant traveled with paper instead of coin; the system handled the actual coin movement separately, batch-settling between offices.

This was not money in the strict sense — the paper certificate was tied to a specific deposit and was redeemable for that deposit only by the named holder. But the structural insight was the recognition that the paper itself could circulate as a representation of value, with the underlying coin movement decoupled from the transaction sequence. The same insight would be re-derived independently in 12th-century Italian banking with bills of exchange, and again in 17th-century Amsterdam with the Wisselbank.

Song dynasty jiaozi and the inflation problem

The transition from deposit certificate to circulating currency happened in Sichuan around 1000 CE, where private merchants began issuing standardized notes called jiaozi that traded among themselves at face value. The Song government took over jiaozi issuance in 1023, creating the first government-issued paper currency in world history. Initially the jiaozi were fully backed by reserved coinage; the system worked because the reserve ratio was conservative and the issuer was credible.

The political-economy problem appeared within a generation. The cost of fighting the Liao and Western Xia wars exceeded the Song treasury's capacity, and the government discovered that printing additional jiaozi without backing was politically easier than raising taxes. The currency depreciated steadily through the late Song dynasty, then catastrophically under the Yuan when the Mongol rulers issued Zhongtong notes that were initially silver-backed and then progressively unbacked. The Zhongtong currency had collapsed completely by 1356, and the early Ming dynasty's Da Ming Tongxing Baochao went the same way by 1455. The Ming government abandoned paper currency entirely in 1525, and China was effectively on a silver standard until the 20th century.

The Chinese paper-money episode demonstrated both the possibility and the failure mode of the institution: paper currency works when the issuer can credibly commit to backing or to controlled supply, and fails when the issuer cannot. The 700-year experiment from Tang feiqian to Ming abandonment of paper money was an enormous, civilization-scale empirical study in the trust problem, and the answer it produced was that no Chinese government had managed to maintain the institutional discipline required.

The European delay

Marco Polo described the Yuan paper currency in The Travels around 1300, and European readers were uniformly incredulous. The proposition that printed paper could be currency seemed to violate basic intuitions about value, and Polo's account was widely treated as exaggeration alongside his stories about the imperial postal service and the size of Hangzhou. Paper money would not appear in Europe for another 400 years.

The intermediate institutions that prepared the European reception were the late-medieval Italian innovations of bills of exchange and double-entry bookkeeping. Florentine and Genoese banks of the 13th-15th centuries developed instruments that allowed merchants to settle international trade without physically moving coinage, with the Medici bank of the 15th century operating an effective international clearing system. These were not currency — they were short-duration instruments tied to specific transactions — but they demonstrated that paper claims could circulate among parties who trusted the issuer, which was the conceptual prerequisite for the next step.

The first European bank to issue circulating paper currency was the Bank of Stockholm in 1661, three years before its bankruptcy. The first successful European paper currency was the Bank of England's notes after its founding in 1694, which were issued against government debt and were redeemable for gold at face value. The Bank of England's institutional structure — private bank, government concessionary, gold-redemption discipline — became the template for the subsequent two centuries of European banking and the model that would be exported globally.

John Law's experiment

The most spectacular paper-money disaster in European history was John Law's experiment in France between 1716 and 1720. Law was a Scottish economist who convinced the French regent to authorize a private bank issuing paper currency, then to fold the bank into a colonial-trading-monopoly company, then to consolidate the public debt into the company's stock. The arrangement appeared to resolve the French fiscal crisis and the Mississippi colonial-development problem simultaneously by creating a financial institution that could issue paper claims against expected future colonial returns.

The collapse, when it came in 1720, was as fast as the rise. Law had progressively un-backed the currency to fund stock purchases; the stock price had risen by an order of magnitude on speculative dynamics rather than colonial revenue; when confidence shifted, both currency and stock collapsed within months. The French treasury was bankrupt, the public was ruined, and the political consequence was a multi-decade French aversion to paper money that left France on a coinage standard until the Revolution. The English economic recovery from the parallel South Sea Bubble of 1720 was much faster, partly because the Bank of England had not been involved.

The Law episode is sometimes presented as a moral about paper money, but the more careful reading is that it was a moral about issuer discipline. The Bank of England was issuing paper currency in the same period and continued to do so successfully because its institutional structure imposed constraints that Law's bank did not have. The lesson the 18th century took from John Law was that paper currency required specific institutional safeguards, not that paper currency was inherently unsafe.

Central banks and the gold standard

The 19th century was the era of consolidation and standardization in paper currency. The Bank of England model spread through Europe, with central banks established progressively: Banque de France 1800, Norges Bank 1816, Reichsbank 1876. The United States went through a more contentious history with the First and Second Banks of the United States both losing their charters before the Federal Reserve was established in 1913. The gold standard — paper currency redeemable for fixed weights of gold — was the discipline that constrained issuance and maintained the credibility of paper currency through the 19th and early 20th centuries.

The First World War broke the gold standard. The belligerent nations suspended convertibility to fund the war effort and printed currency to cover the gap. The interwar attempts to return to gold convertibility were partial, fragile, and ended in the 1931 sterling crisis and the 1933 American gold-redemption suspension. The Bretton Woods system after 1944 was a partial gold standard — the dollar was pegged to gold at $35/oz, and other currencies were pegged to the dollar — that lasted until Nixon's 1971 closure of the gold window made the dollar unbacked fiat.

The fiat era

The current fiat-currency era has lasted 55 years as of 2026 and is the longest unbacked-paper-currency episode in human history. The Tang-to-Ming Chinese episode lasted 700 years, but with multiple resets when individual currencies collapsed. The continuous post-1971 dollar regime has now run longer than any individual Chinese paper currency before its collapse. Whether this is evidence that modern central-bank institutions have solved the trust problem in a way that no previous civilization managed, or whether we are in a long pre-collapse phase of the same recurring pattern, is a question that economists disagree about and that 2026 cannot answer.

The institutional configurations that support the modern dollar are: an independent central bank with a price-stability mandate, a deep public-debt market that gives the currency reserve-asset properties, a global financial infrastructure that makes the dollar the default international medium of exchange, and a political consensus across both major American parties that has supported the basic institutional framework through 50 years of administration changes. Each of these is a contingent achievement that could be undone, and the present-day discussions of central-bank digital currencies and stablecoins are partly experiments in alternative configurations of the same underlying trust problem.

Paper money is one of the deepest social institutions in human history, and the 1200-year arc from Tang feiqian to modern fiat is the slow elaboration of the institutional structures required to make printed paper function as a medium of exchange. The institutional achievement is invisible when it works and catastrophic when it fails. Every generation that has lived under stable paper currency has been the beneficiary of accumulated institutional capital that took centuries to develop and that could be lost faster than it was built. The schoolroom story compresses this into a paragraph; the actual history is more interesting and more sobering.