The War in Iran’s Ripple Effect on the Global Energy Economy

Brown Watson Institute
Brown Watson InstituteMay 28, 2026

Why It Matters

The shock exposes how geopolitical conflict in the Middle East can quickly transmit to consumer budgets and national economies via tightly integrated oil markets, influencing energy policy, trade decisions and incentives for accelerating clean-energy investments. Policymakers and businesses face heightened pressure to balance short-term supply responses with long-term decarbonization strategies.

Summary

Three months after the Iran war and the effective closure of the Strait of Hormuz, global oil markets have been rocked: the disruption cut off more than 10% of global crude flows and drove immediate spikes in gasoline and diesel prices. Brown University’s Climate Solutions Lab built an energy cost tracker showing U.S. households have paid roughly $43 billion more for gasoline and diesel since Feb. 28, with per-household impacts varying widely by state due to local prices, driving patterns and vehicle types. Though the U.S. imports little oil from the Gulf, integrated global markets mean Asian price shocks prompt U.S. exports and domestic price increases—an outcome that would be mitigated only by measures like export restrictions. The episode is reshaping investment and policy debates about energy security and the pace of the climate transition.

Original Description

The war in Iran is entering its third month, and according to the War in Iran Energy Cost Tracker — a new project from the Watson School's Climate Solutions Lab — the war has already cost Americans over 40 billion extra dollars in gas and diesel. But as Jeff Colgan, professor of political science at the Watson School and director of Watson’s Climate Solutions Lab, explains, when it comes to the effects of this war, the rising price of fuel is just the tip of the iceberg.
On this episode, Watson School dean and economist John Friedman talks with Jeff about its effects on everything from individual consumer finances to national security, geopolitics, and the future of climate change.
Check out the Climate Solutions Lab’s Iran War Energy Cost Tracker:
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Transcript coming soon to our website

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