---
title: "The Monetary System & US Dollar Dominance Explained"
description: "See how the international monetary system evolved from Bretton Woods to floating rates and why dollar dominance shapes trade and sanctions power for the exam."
url: "https://modeldiplomat.com/learn/lessons/exam-global-economy-the-international-monetary-system-the-dollar"
---

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The international monetary system & the dollar

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# The international monetary system & the dollar

How the international monetary system evolved from Bretton Woods to floating rates, and why the US dollar's dominance shapes trade, reserves and sanctions power.

## The classical gold standard and its collapse

The international monetary system is the set of rules, institutions and conventions governing how currencies are valued and exchanged across borders. Under the classical **gold standard (c. 1870–1914)**, major currencies were convertible into gold at fixed parities; the Bank of England, anchoring sterling, made London the hub of global finance. The system enforced discipline—balance-of-payments deficits drained gold and forced domestic deflation—but it sacrificed monetary autonomy and shattered under the financing demands of the First World War.

The interwar attempts to restore gold (Britain returned in 1925 at the prewar parity under Churchill, a decision Keynes attacked in *The Economic Consequences of Mr. Churchill*) ended in competitive devaluations, the 1931 sterling float, and beggar-thy-neighbour protectionism that deepened the Great Depression.

## Bretton Woods, 1944

The **Bretton Woods Conference (July 1944, New Hampshire)** designed the postwar order. The defeated Keynes plan for an international clearing union and a synthetic currency (the *bancor*) lost to the American White plan. The result: a **gold-exchange standard** in which the US dollar was pegged to gold at **USD 35 per ounce**, and other currencies pegged to the dollar within ±1% bands, adjustable only for 'fundamental disequilibrium.'

Two institutions were born: the **International Monetary Fund (IMF)**, to provide short-term balance-of-payments financing and police par values, and the **International Bank for Reconstruction and Development (IBRD)**, the original World Bank. The dollar became the world's reserve and settlement currency by design.

## The Triffin Dilemma and the Nixon Shock

Belgian-American economist **Robert Triffin** warned the US Congress in 1960 of a structural contradiction: the world needed ever-more dollars for liquidity, but the more dollars circulated abroad, the less credible was their convertibility into a finite US gold stock. The **Triffin Dilemma** is a recurring exam favourite.

The strains—Vietnam War deficits, French gold redemptions under de Gaulle, and overvaluation—forced **President Richard Nixon on 15 August 1971** to suspend the dollar's convertibility into gold (the 'Nixon Shock'). The **Smithsonian Agreement (December 1971)** tried to salvage fixed rates but failed; by **1973** the major economies floated. The **Jamaica Accords (1976)**, amending the IMF Articles of Agreement (Second Amendment, effective 1978), legalised floating exchange rates and demonetised gold as the system's anchor. **Special Drawing Rights (SDRs)**, created in 1969, became the IMF's reserve asset, valued today against a basket including the renminbi since 2016.

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