From Barter to Digital Currency: How Money Evolved Across Civilizations

Before coins or banknotes existed, people exchanged goods and services directly. The Bank of England's explainer on the history of money notes that early societies moved beyond simple one-for-one swaps by developing accounting and payment systems based on precious metals and commodities measured by weight.

Livestock, shells and the first coins

According to the Bank of England, domesticated cattle served as a unit of exchange as early as 9000 BC, a practice it says still exists in South Sudan today for major purchases and dowries. Cowry shells became a widely used form of payment across large parts of Asia, Africa and Oceania, and in some places in Europe, with the earliest documented use in China dated to around 1300 BC; the Bank notes that the Chinese characters for 'money', 'buy' and 'value' still carry shell imagery.

Metal coinage followed. The Bank of England's timeline states that Chinese craftspeople cast bronze and copper imitations of cowry shells around 1000 BC. The kingdom of Lydia, in what is now Turkey, is credited with producing the first coins made from precious metal around 700 BC.

The London Bullion Market Association (LBMA) describes one Lydian coin in detail: the Croesus stater, minted in the sixth century BCE under King Croesus. Earlier Lydian coins had been struck in electrum, a naturally occurring gold-silver alloy whose gold content varied unpredictably. The LBMA says Croesus's metallurgists developed a refining method to separate electrum into pure gold and pure silver, allowing coins of standardized weight and value — a specimen in the LBMA's collection weighs 10.72 grams. The stater, it says, went on to become 'the most important coin of antiquity,' circulating through the Persian Empire and the Greek world even after Croesus's reign ended in 546 BCE.

Paper money and the rise of banknotes

Paper currency emerged independently in China, centuries before it reached Europe. According to Guinness World Records, merchants in Sichuan printed promissory notes known as 'jiaozi' during the reign of Song dynasty Emperor Zhenzong, between AD 997 and 1022. Unlike earlier 'flying money' certificates, jiaozi could be exchanged between private individuals and redeemed for coin, which Guinness World Records identifies as the feature that makes them the first true paper money in history.

The Bank of England's account adds that China's later, wider use of paper notes under the Ming dynasty eventually contributed to hyperinflation. In Europe, Sweden became the first issuer of banknotes in 1661. The Bank of England itself, founded in 1694, began issuing its own notes the same year, adopting wording already used by earlier goldsmith-bankers' 'running cash notes' — a promise to pay the bearer on demand, a phrase still echoed on UK banknotes today.

From metal and paper to electronic payments

The 20th century brought payment methods that did not rely on handing over coins or notes. The Bank of England's timeline cites Western Union's telegram-based money transfer service, launched in 1860, as an early step toward remote payments. It states that about eight decades later, John Biggins launched what the Bank describes as the first credit card, known as the 'Charg-It' card, and that the first online purchase took place in 1994. Bank balances today mostly exist as digital entries in financial-system databases rather than as physical cash.

Central bank digital currencies

The newest stage of this evolution is the central bank digital currency, or CBDC — a digital form of money issued directly by a central bank rather than by a commercial bank or private company. An IMF Finance & Development article published in September 2022 states that more than half of the world's central banks were exploring or developing a CBDC, with nearly 100 such projects in research or development as of July 2022.

Two CBDCs had been fully launched by that point, the IMF article says: the Bahamian Sand Dollar, introduced in October 2020 to reach unbanked and under-banked populations across more than 30 of the Bahamas' inhabited islands, and Nigeria's eNaira, launched in October 2021. The IMF notes the concept is not entirely new — it traces the first CBDC to Finland's Avant smart card, introduced in 1993 and discontinued in the early 2000s. The IMF lists financial inclusion, payment-system efficiency and safety, and reduced reliance on foreign currencies among the goals driving current CBDC projects, alongside risks such as the potential for bank runs and data-privacy concerns that central banks must weigh.

A recurring pattern

Across roughly 11,000 years, the sources describe the same underlying pattern: each new form of money — livestock, shells, standardized metal coins, paper notes backed by an institution, and now digital entries issued or guaranteed by a central authority — addressed a specific problem with the form it replaced, whether that was the difficulty of matching barter trades, the unreliable purity of early coin metal, the weight of carrying metal currency, or the need to move value instantly across long distances.