The dollar & the US in the global economy
How the US dollar became the anchor of the global financial system, the institutions behind it, and the leverage and risks it confers on US foreign policy.
From Bretton Woods to the fiat dollar
The dollar's primacy is an engineered outcome, not an accident. At the Bretton Woods Conference (July 1944), 44 Allied nations meeting at Mount Washington Hotel in New Hampshire adopted a system designed largely by Harry Dexter White (US Treasury) over John Maynard Keynes's competing 'bancor' plan. The agreement fixed member currencies to the US dollar, and pegged the dollar to gold at $35 per ounce. It created the International Monetary Fund (IMF) to police exchange-rate stability and provide short-term balance-of-payments lending, and the International Bank for Reconstruction and Development (IBRD), the original World Bank institution, for reconstruction finance. The US, holding roughly two-thirds of the world's monetary gold by 1945, became the system's anchor.
The gold link broke under the strain of US deficits financing the Vietnam War and Great Society spending. On 15 August 1971, President Richard Nixon, in the 'Nixon Shock,' suspended the dollar's convertibility into gold, imposed a 90-day wage-price freeze, and levied a 10% import surcharge. The Smithsonian Agreement (December 1971) attempted a revised peg, but by 1973 the major economies floated their currencies. The dollar thereby became a fiat currency, backed not by metal but by the credibility of the US government, the depth of US capital markets, and the size of the American economy.
Why the dollar still dominates
The dollar survived the end of gold convertibility because the structural advantages compounded. As of recent data, roughly 58-60% of global foreign-exchange reserves are held in dollars (IMF COFER), the dollar is on one side of nearly 90% of FX transactions (BIS Triennial Survey), and most commodity trade—crude oil above all—is invoiced in dollars, the so-called petrodollar arrangement rooted in the 1974 US–Saudi understanding.
Three pillars sustain this. First, deep and liquid markets: the US Treasury market, the largest and most liquid sovereign-debt market on earth, gives foreign central banks a safe, tradable place to park reserves. Second, network effects: traders, banks, and exchanges use dollars because everyone else does, lowering transaction costs. Third, institutional credibility: the Federal Reserve's independence, the rule of law protecting contracts, and the absence (until recently) of capital controls.
This confers what Valéry Giscard d'Estaing in the 1960s called America's 'exorbitant privilege': the US borrows cheaply in its own currency, runs persistent current-account deficits without a balance-of-payments crisis, and exports its monetary policy worldwide. The Fed's tightening cycles (notably 1979–82 under Paul Volcker, and 2022–23) transmit globally, raising borrowing costs and stressing emerging-market debtors. Reserve-currency status is thus both a tool of statecraft and a source of friction with allies and rivals alike.
