The 2026 Iran War caused the largest energy shock since the oil crises of the 1970s.

Judge as of October 2026. Two things must hold: a war involving Iran happened in 2026, and it caused an energy shock (a rise in oil and/or gas prices, or a supply disruption) larger than any since the 1970s oil crises (1973 and 1979). That means larger than the 1990 Gulf War spike, the 2008 spike and the 2022 Russia-Ukraine shock, measured by the percentage price rise or the share of global supply lost, as described by the IEA, EIA, major banks or mainstream financial press. True: both hold, and authoritative sources describe the 2026 shock as the largest since the 1970s (or the data clearly show it was). Mostly true: the shock is the largest on most main measures (for example supply lost, or oil price rise), and one comparable episode is about equal on a single measure. Mixed: the shock was clearly very large but sources disagree on whether it beats 1990 or 2022. Mostly false: there was a 2026 Iran war and a significant energy shock, but it was clearly smaller than at least one post-1970s episode (for example smaller in percentage and level than 2022 or 1990). False: there was no 2026 Iran war, or it caused no meaningful energy shock.

Set before the research began.

1. E1 The Middle East and Global Energy Markets – Topics International Energy Agency (IEA) · 12 August 2026

   “In the wake of the largest oil supply disruption in history, Brent futures – the global benchmark for crude prices – rose steeply, peaking at more than 60% above pre-conflict levels in late April.”

2. E2 Six Charts to Explain the Global Energy Crisis Center for Strategic and International Studies (CSIS) · 17 September 2026

   “Energy prices did not spike as dramatically as in similar crises in 1973 and 1979 due to several important market conditions.”

3. E3 Six Charts to Explain the Global Energy Crisis Center for Strategic and International Studies (CSIS) · 17 September 2026

   “Brent crude prices responded to the disruption of energy flows, rising from around $70 per barrel in February to $145 in April, settling around $90 per barrel by the end of August.”

4. E4 How much longer can the world absorb the Iran war shock? The Irish Times (Martin Wolf column, Financial Times copyright) · 8 October 2026

   “Instead, oil prices peaked at USD 126 per barrel in April 2026.”

The IEA (E1) calls the 2026 Middle East conflict disruption "the largest oil supply disruption in history". Read with the 2026 column on the Iran war shock [E4], that indicates a supply shock larger than any after the 1970s on the supply-lost measure. CSIS (E2) says prices did not spike as sharply as in 1973 and 1979, which fits the claim's "since the 1970s" framing. On price, the sources do not agree: E1 puts the Brent peak at more than 60% above pre-conflict levels, E3 gives a rise from about $70 to $145, and E4 gives a peak of $126. None of the evidence compares these price rises directly with 1990 or 2022. Because the claim is clearly supported on supply disruption but less settled on price, the verdict is mostly true rather than true.