The Strait That Writes Scripts

Twenty-one miles. And yet, for the last half-century, whoever holds leverage over that narrow channel has effectively held a pen to the script of global politics. Not authored the whole script. Just held the pen.

This is the pattern nobody bothers to name because naming it would require admitting how little has changed since the Persians controlled the Bosphorus in 480 BC.

Geography writes scripts. The actors update their costumes. The trajectory persists.

The recent Foreign Affairs piece frames the Strait as a "warning" — specifically, a warning to the Indo-Pacific. Its core argument: that Iran's sustained use of Hormuz as an economic pressure point — generating leverage without closure — has provided a working template that Beijing has been studying, and the Indo-Pacific is the next application. That framing is correct, and the warning is considerably darker than the diplomatic language typically used to deliver it. What Hormuz has been demonstrating for forty years, China has been studying with the patience of a civilization that watched Western power mechanics operate firsthand and drew the correct conclusions about how they work.

i · the chokepoint as history's oldest pen

The historical record on geographic chokepoints has a consistency that should make any serious observer uncomfortable. The kind of consistency that becomes visible only when you stop reading events as discrete crises and start reading them as instances of the same pattern.

Walk it backward.

The Dardanelles in World War I: the Gallipoli campaign was not fundamentally about ideology or territorial ambition in the conventional sense. It was about who controlled the water passage between the Mediterranean and the Black Sea — and therefore who could supply Russia, and therefore who could knock the Ottoman Empire out of the war while avoiding the Western Front meat grinder. The British and ANZAC forces lost the equivalent of 56,000 dead learning that you cannot take a chokepoint from the outside if the defending party is committed to holding it. The pattern encoded: geographic leverage held by a lesser power defeats a greater power's logistics. Every time.

Suez in 1956: Egypt nationalizes the canal. Britain and France, in their last serious performance of imperial competence, invade. The United States — calculating that colonial adventurism was incompatible with Cold War alliance management — tells them to stop. They stop. The lesson absorbed by everyone watching, particularly the developing world: a chokepoint's power isn't primarily military. It's economic. The threat to close it is worth more than actually closing it. The uncertainty itself generates leverage. Every time.

The 1973 oil embargo: OPEC deploys the chokepoint without controlling any single strait. The production chokepoint is the pipeline valve and the shipping capacity together, and it works just as efficiently as a geographic narrows. American gas lines stretched around city blocks. European economies reoriented in months. Japan, with virtually no domestic oil, entered a national emergency. The entire industrial architecture of the Western world was reorganized over the following decade around the memory of what it felt like to be held hostage by physical geography and the political will of a small coalition.

Iran since 1979: The Islamic Republic inherits the Hormuz position and understands its value immediately. Every subsequent crisis with the West includes a ritual brandishing of the Hormuz threat. Will they close it? Probably not. But the uncertainty functions as leverage regardless. The Strait doesn't need to be closed to write the script — it just needs to be credibly threatened as closeable. This is the fully mature form of chokepoint leverage: the threat itself is the instrument. Closing it would destroy the leverage by forcing resolution. Not closing it preserves the threat indefinitely.

The chokepoint doesn't care about the ideology of whoever holds it. It worked for medieval sultans, revolutionary republics, colonial administrators, nationalist movements, theocratic governments, and oil cartels with equal indifference. Twenty-one miles of water is twenty-one miles of water. The physics of global commerce doesn't renegotiate based on the political character of the party exploiting it.

ii · the tutorial china has been watching

Here is where the pattern becomes genuinely instructive — and alarming for anyone thinking about the next decade of Indo-Pacific dynamics.

China has spent roughly forty years in systematic study of Western power mechanics. This is not a conspiracy theory or analytical projection — it's documented in PLA strategic literature, in the academic output of Chinese security studies programs, and in the institutional memory of a civilization that experienced the full violence of Western industrial force projection in the 19th century and spent the 20th and early 21st centuries reverse-engineering how it works.

What does the Hormuz record teach, studied carefully?

It teaches that a chokepoint doesn't need to be closed to generate leverage. The credible threat of closure produces immediate economic effects: insurance premiums spike, tanker routing changes, commodity futures markets reprice, and political statements start arriving from every capital with economic exposure. All of this happens before a single shot is fired and before a single barrel is actually disrupted. The leverage is operational the moment it's credible.

It teaches that geographic leverage inverts the usual logic of military power asymmetry. Iran — a regional power with significant but not overwhelming military capability — can hold the global economy hostage from a position that the United States, with the most powerful naval force in human history, cannot simply overpower without triggering catastrophic second-order economic consequences. The very attempt to neutralize the threat activates it.

It teaches that international response to chokepoint threats is structurally disunited and slow. The Gulf states, European nations, the United States, Japan, South Korea, and China itself all have distinct exposure profiles to a Hormuz closure. Those divergent interests create fissures that the threatening party can exploit diplomatically before a single military move is made.

Now apply this framework to the Taiwan Strait.

The physical geography is different — the Strait is 110 miles across, not 21. But this misses the actual chokepoint. The relevant narrows is not the Strait itself. It's the semiconductor supply chain that runs through Taiwan. Taiwan Semiconductor Manufacturing Company produces approximately 90 percent of the world's most advanced chips — the components on which modern automotive, defense, medical, communications, and consumer electronics infrastructure depends. In the oil era, Hormuz was the chokepoint because everything industrial ran on petroleum. In the current era, TSMC's fabrication facilities in Hsinchu are the chokepoint because everything digital runs on advanced chips.

A Chinese blockade of Taiwan — not an invasion, a blockade, the more surgical and ambiguous application of force — doesn't need to succeed immediately to generate leverage. It needs to be credibly threatening. The insurance premiums spike. The supply chain analysis begins. The semiconductor-dependent industries start emergency inventory calculations. The political responses diverge along exactly the fault lines the Hormuz record predicts they will.

China has watched Iran demonstrate this leverage architecture for decades. The Foreign Affairs framing of Hormuz as a "warning" for the Indo-Pacific is exactly right. It's a warning because the tutorial is already complete and the homework is already done.

iii · the script currently being written

The specific dynamic worth tracking is the interaction between Middle East instability and Indo-Pacific calculations.

Every Hormuz escalation requires an American response: carrier group repositioning, diplomatic engagement, alliance management in the Gulf. That response is not free. It costs military assets, political bandwidth, and senior attention — none in infinite supply.

The structural incentive is visible without requiring coordination or conspiracy: a Hormuz crisis that pulls American military and diplomatic capacity toward the Persian Gulf creates simultaneous capacity questions in the Pacific. Strategic planners in Beijing do not need to coordinate with Tehran to notice this arithmetic. They need to read the deployment data, which is substantially public.

The historical pattern this resembles is the general phenomenon of simultaneous pressure on multiple strategic fronts — the technique that has been applied against overextended empires since antiquity. You don't need to win at both frontiers simultaneously. You need to make the defending power prioritize, and then exploit whichever theater receives less attention. Rome dealt with Parthia while managing the Rhine. The Habsburg Empire dealt with France while managing the Ottomans. The specific actors update. The strategic geometry repeats.

The "unprecedented" nature of simultaneous Hormuz tension and Taiwan Strait pressure will become a standard frame in geopolitical analysis over the next decade. The precedents for it are just old enough that they've fallen out of the reading list.

The strait writes scripts. It always has. The question the Foreign Affairs piece is quietly raising — and that the pattern record insists we take seriously — is whether anyone watching the current production understands they're not attending the premiere.

They're watching the revival. The program notes have been available for centuries.

iv · sources

• A Hormuz Warning for the Indo-Pacific — Foreign Affairs
• World Oil Transit Chokepoints — U.S. Energy Information Administration, 2017
• Iran and the Threat to Close the Strait of Hormuz — Council on Foreign Relations
• The World Is Dangerously Dependent on Taiwan — The Economist, 2021-03-06
• The Suez Crisis, 1956 — U.S. Department of State, Office of the Historian