The U.S. dollar holds a key position in the global financial system for a practical reason: energy. For roughly five decades, the world’s most traded commodity, oil, has been priced and settled primarily in dollars. This arrangement, known as the petrodollar system, has reinforced U.S. financial influence without requiring a formal global treaty.
From Gold to Oil
After World War II, the international monetary order was structured around the Bretton Woods framework. Major currencies were pegged to the U.S. dollar, and the dollar itself was convertible into gold at a fixed rate. This gave Washington significant power, but it depended on one assumption: that Washington would always hold enough gold to support its currency.
By the late 1960s, that assumption no longer held. Rising spending on the Vietnam War and domestic programs exceeded available gold reserves. Foreign governments began converting dollars into gold. In 1971, President Richard Nixon suspended dollar–gold convertibility, effectively ending the Bretton Woods system. The dollar did not collapse, but it no longer had gold behind it.
President Nixon announces the end of gold convertibility, 1971 (Richard Nixon Library)
The Saudi Connection
In 1974, the United States reached a series of agreements with Saudi Arabia. Saudi oil would be priced in U.S. dollars, and a significant share of surplus revenues would be reinvested into U.S. Treasuries and other dollar-denominated assets. In return, the United States provided military support, arms sales, and political cooperation.
US President Richard Nixon (L) and US Secretary of State Henry Kissinger (C) with Saudi King Faisal at the Riasa Palace in Riyadh, 1974
Saudi Arabia was the largest oil exporter within OPEC at the time, and its decision helped standardize dollar pricing across global energy markets. The logic was straightforward: any country needing oil would first need dollars. That steady structural demand strengthened the dollar’s global role even after gold convertibility had ended.
How the System Reinforces Itself
The petrodollar system does not rest on a single treaty. It functions through market incentives and institutional habits. Oil exporters accumulate large dollar reserves and often invest them in U.S. government debt or financial markets. Importers hold dollar reserves to ensure stable access to energy. Global shipping, insurance, and commodity exchanges largely operate within this same dollar-based infrastructure.
Photo: WallStreetMojo
This structure helps explain how the United States, for now, can sustain large fiscal deficits while maintaining deep and liquid capital markets. It also underpins Washington’s ability to impose financial sanctions, since much of global trade still clears through dollar-based systems.
Pressure Points and Shifts
The system is not static. China has gradually expanded the use of the renminbi (yuan) in bilateral energy trade, including some oil purchases settled outside the dollar. Russia, particularly after the 2022 invasion of Ukraine and subsequent sanctions, redirected energy exports and increased the use of non-dollar settlement mechanisms. Several members of BRICS have also explored alternative payment systems and greater reserve diversification.
“The dollar is being used as a weapon.” — Russian President Vladimir Putin
These developments reflect a desire to reduce exposure to U.S. financial leverage rather than an outright replacement of the dollar. No other currency currently matches the dollar’s combination of liquidity, legal predictability, and depth of capital markets. Instead of a sudden shift, global trade is moving toward a more fragmented system, with transactions settled across multiple payment channels. This broader transition is explored further in the rise of multipolar payment systems.
“The reform of the international financial architecture is pressing.” — Chinese President Xi Jinping
Why the Petrodollar Still Matters
Despite growing experimentation, the petrodollar remains deeply embedded in global trade. Energy markets tend to change slowly, as reliability takes priority over innovation. Even countries seeking alternatives often continue to hold dollar reserves as protection against market volatility.
The system endures largely because of institutional momentum. Replacing it would require coordinated changes across energy pricing, financial plumbing, reserve management, and security arrangements. Until those layers shift together, the dollar’s role in energy trade will remain a defining feature of global geopolitics.
Explore more deep dives on energy, resources, and the mechanics of global power:
Power at the global level is built on systems. Personal autonomy follows the same logic.
