Suffocation of the global economy

In the Persian Gulf, a thirty-three-kilometre corridor shapes the lives of eight billion human beings. Twenty million barrels of oil pass through it every day — 20 per cent of global consumption, according to the EIA — along with a fifth of the world’s liquefied natural gas trade. The global shock of such a blockade would exceed the pressure it places on Iran.

Reducing Hormuz to crude oil would be a framing error. Hormuz is not a tap, but the logistical backbone of the industrialised world — through which flow food, in the form of nitrogen-based fertilisers synthesised from Qatari gas; medicine, in the form of petrochemical molecules used in virtually all modern pharmaceuticals; and jet fuel, without which aircraft remain grounded.

A blockade would trigger a physical, simultaneous shortage within weeks, resulting in food supply disruptions, grounded fleets, factory shutdowns, and hospital rationing.

For scale, the 1973 Arab embargo removed 5 per cent of global supply — and was enough to trigger a worldwide recession. A blockade of Hormuz represents a shock four to five times greater, in an economy incomparably more interconnected. The diagram below traces the cascade mechanics, from chokepoint to deficit, from escalation to strategic trap.

A confrontation no one controls

Article 38 of the United Nations Convention on the Law of the Sea guarantees the right of transit passage through international straits. Blocking a Chinese or Indian tanker would not be an economic pressure measure, but a direct violation of the maritime sovereignty of nuclear powers.

China, like India, imports 40 per cent of its oil from the Gulf. Beijing maintains warships in the area and naval access agreements with Oman, with Pakistan, with Djibouti. Accepting that a Chinese commercial vessel can be stopped by the US Navy in international waters would validate the precedent of American control over Chinese navigation — including, tomorrow, in the Taiwan Strait. No Chinese leader will ever tolerate it. Should China decide to pre-emptively escort its tankers, the US Navy would then have to choose between opening fire and stepping aside.

In 1988, the cruiser USS Vincennes shot down an Iran Air Airbus — 290 civilians killed — after mistaking it for an F-14 fighter, in a context of far lower tensions. It is in this saturated space that escalation would play out — not in capitals. Who can rule out the nervous commander, the vessel that fails to comply, the warning shot that goes wrong?

The trap

The threat of a blockade places Washington in a dilemma. Carried out, it triggers a global crisis in which America is both the author and one of the first victims. Withdrawn, it durably weakens American deterrence.

Thirty-three kilometres of water. No way out without damage.