David McWilliams’s The History of Money (2024) is a work of accessible economic history that traces money’s development from the ancient world to today. McWilliams, an Irish economist and commentator known for explaining complex topics clearly through his podcast and the Kilkenomics festival, argues that money functions as both an economic tool and a social technology that has co-evolved with humanity. The book follows the development of financial innovations from grain-based accounting and early coinage to modern state-issued money and cryptocurrency. McWilliams proposes that this long history has transformed humanity into a “plutophyte” species (his term), one shaped by long exposure to money and credit.

The book was a bestseller in the United Kingdom and Ireland. It argues that monetary innovations can drive growth while also introducing new risks, a throughline reflected in the theme of how Innovation Brings Progress and Crises. The narrative demonstrates that Trust as Monetary Infrastructure is essential for any currency’s success, showing how shared belief supports systems from the Florentine florin to the modern US dollar. Ultimately, the work frames the entire history of civilization through the lens of Money as Social Technology, arguing that money has enabled large-scale cooperation, supported empires, and still shapes politics and daily life.

This guide refers to the 2025 hardcover edition published by Henry Holt and Co.

Content Warning: The source material and guide include depictions of graphic violence, gender discrimination, religious discrimination, antigay bias, racism, death, sexual violence, cursing, and physical abuse.

Summary

The narrative begins by illustrating the power of money to destabilize societies through historical anecdotes involving Adolf Hitler’s plan to forge British currency and Vladimir Lenin’s strategy to deliberately weaken the Russian ruble. This reveals money’s relationship to collective belief and, more broadly, its social dimensions. The central thesis is that humanity has co-evolved with money, becoming a “plutophyte” species, meaning a species shaped by money, in a journey from its ancient origins to the present day.

The story of money starts with the Ishango Bone, a potential tally stick from around 18,000 BCE from the Congo, representing the dawn of accounting. Following the advent of agriculture and the growth of large settlements, grain becomes the first form of money, enabling the management of surpluses, taxation, and complex societies. The text then moves to ancient Mesopotamia, where one of the earliest recorded personal names in history, Kushim, belongs to a man who takes a loan in barley to make beer.

This transaction illustrates the invention of the rate of interest, a concept that puts a price on time. Here, money is linked to standardized weights like the shekel and the invention of writing, cuneiform, which was developed to keep commercial records. Sophisticated financial tools, such as the spreadsheet-like Drehem tablet, demonstrate an early credit-based economy. A major shift occurs with the Lydian civilization’s invention of coinage around 700 BCE, which transitions money from a system of contracts to a physical, portable form. This innovation facilitates “bottom-up” market economies, with the state establishing itself as the official “issuer” of currency.

In ancient Greece, the widespread adoption of the silver tetradrachm coin is linked to an intellectual shift from myth-based thinking (mythos) to logic-based reasoning (logos). The Athenian trade empire, built on silver rather than agriculture, fosters new political ideas like the city-state (polis) and democracy, with the marketplace (agora) becoming the center of civic life. The Roman Empire then builds on these foundations, with its key innovation being the extensive use of credit. The excavated city of Pompeii reveals a society centered on profit. Rome auctions tax-collection rights in conquered provinces to private corporations, creating a large shareholder class. This sophisticated financial system experiences the world’s first credit crisis in 33 CE under Emperor Tiberius, who acts as an early “lender of last resort” (72). The empire’s eventual decline has been linked to the hyperinflation caused by centuries of currency debasement.

During the early Middle Ages in northwestern Europe, money becomes much scarcer, replaced by a feudal barter system. Around 1000 CE, an economic revival is sparked by two innovations: the heavy metal plow, which boosts agricultural productivity, and new silver mines in Germany, which reintroduce coinage. This leads to population growth, urbanization, and the formation of artisan guilds. A crucial intellectual leap occurs when 12th-century scholar Leonardo of Pisa, known as Fibonacci, introduces Hindu-Arabic numerals and the concept of zero, or “Saracen magic,” into Europe from the Arab world via multicultural Norman Sicily. His book, Liber Abaci, along with the development of double-entry bookkeeping, revolutionizes European commerce.

This new financial knowledge fuels the rise of Florence as a commercial powerhouse. The city’s gold florin becomes Europe’s trusted reserve currency. Florentine merchants pioneer modern banking, developing letters of credit, bills of exchange, and, most significantly, fractional reserve banking, which McWilliams says allows private banks to create money “out of thin air” (132), shifting power from monarchs to financiers. In 15th-century Germany, Johannes Gutenberg’s printing press, initially used to print letters of indulgence for the Church, drastically lowers the cost of information. This technology enables the rapid spread of Martin Luther’s ideas, fueling the Protestant Reformation. The era of European expansion begins, gaining material wealth from colonized cultures like the Aztec Empire while, elsewhere, monetary systems begin to move beyond gold and silver.

The 17th-century Dutch Republic becomes the new center of financial innovation, creating the first major public shareholder company (the VOC), a precursor to the central bank (the Wisselbank), and the perpetual bond. This financial sophistication also leads to the first major speculative bubble, the Tulipmania of the 1630s. Dutch financial technology is then transferred to London, laying the groundwork for Britain’s economic dominance.

In the early 18th century, Scottish theorist John Law attempts to introduce fiat paper money in France through his Mississippi Company, leading to a major speculative bubble that collapses and discredits financial innovation in France for decades. The subsequent fiscal crisis helps spark the French Revolution, which finances itself with a new paper currency, the assignat, backed by confiscated Church lands. Over-printing to fund wars contributes to hyperinflation and the Reign of Terror.

Learning from the French experience, Alexander Hamilton establishes a stable financial architecture for the new United States. He creates the US dollar, pegs it to the Spanish silver dollar, assumes state debts into a single federal debt, and founds the first Bank of the United States. This system fuels America’s rapid 19th-century growth. The century is characterized by an economy that functions like an evolutionary system, where the deflationary Gold Standard benefits creditors over debtors. This economic tension fuels the rise of the Populist movement in the US, which campaigns for a bimetallic (gold and silver) standard to increase the money supply. The dark side of this globalized, money-driven economy is revealed in Belgium’s brutal exploitation of the Congo for rubber, a demand fueled by the invention of the bicycle. Irish diplomat Roger Casement exposes the atrocities.

The pre-WWI modernist era is a period of intense artistic and commercial innovation, which comes to a halt with the war. The subsequent hyperinflation in Germany’s Weimar Republic, caused by war debts and reparations, destroys the savings of the middle class and creates the political chaos that Adolf Hitler exploits.

The modern era of money begins in 1971 when the US abandons the last vestiges of the Gold Standard, ushering in a global system of fiat money, backed only by government promise. The conventional view that central banks control the money supply is challenged; instead, it is argued that commercial banks create most money as credit, with central banks having less control than is commonly believed, a fact highlighted by the massive Eurodollar market that grew largely outside domestic regulation.

McWilliams explores the psychology of credit-driven boom-bust cycles through the 2008 financial crisis. The policy response, quantitative easing, is described as inflating asset prices, worsening wealth inequality, and contributing to a new wave of populism. The book concludes by examining the 21st-century battle between private money, represented by cryptocurrencies like Bitcoin, and public, state-issued money. Crypto is critiqued as a volatile speculative asset rather than a functional currency. In contrast, the success of M-Pesa, a mobile phone-based money system in Kenya, is presented as a true, bottom-up monetary evolution. McWilliams ends by reaffirming that money is a constantly adapting social technology that has shaped humanity’s past and will continue to shape its future.