Chokepoints are a form of foreign policy

LONDON —

A chokepoint is any node through which a disproportionate share of something must pass. The classic examples are maritime — straits and canals where geography forces concentration. The contemporary ones are mostly not.

Dollar clearing, advanced lithography, specific classes of chemical precursor, a handful of subsea cable landing stations, certain classes of reinsurance, the refining capacity for particular critical minerals: each is a narrow passage created not by geography but by the economics of extreme specialisation. Efficiency produced them. A global economy optimised for cost concentrates capability wherever it is cheapest, and concentration is what a chokepoint is.

Why they are attractive

Chokepoint control offers something conventional statecraft rarely does: leverage that is precise, fast and deniable.

It is precise because it can be applied to a named entity rather than a population. It is fast because it requires no deployment and no legislative process — often only a licensing decision. And it is deniable because much of the effect is delivered by private firms managing their own risk, which lets a government produce a large economic outcome while formally having done something narrow and technical.

Above all it is asymmetric in a way that does not require military superiority. A middle-sized economy that hosts an irreplaceable industrial capability has leverage over states many times its size. This is a genuinely new distribution of power, and it is why chokepoint mapping has become a core function of economic ministries that previously had no security remit.

The self-limiting problem

Chokepoint power has an unusual property: using it degrades it.

Every exercise of control is also a demonstration to every dependent party that the dependency is dangerous. The reliable consequence is substitution — subsidised domestic capacity, stockpiling, alternative suppliers, parallel settlement systems, redundant routing. None of these happen quickly, and most are more expensive than the arrangement they replace. But they are cumulative and hard to reverse, because once a state has paid the capital cost of an alternative it will not willingly return to dependence.

So the holder of a chokepoint faces a genuine trade-off between exercising leverage now and retaining it later. Restraint preserves the asset; use spends it. Governments that treat chokepoint control as an unlimited resource tend to discover, over a decade, that they have financed their own replacement.

What to watch

Three indicators distinguish real leverage from the appearance of it:

• Substitution lead time. How many years, and how much capital, would a determined state need to route around this node? Under three years is an inconvenience; over ten is genuine structural power.
• Coalition breadth. A chokepoint controlled by one state invites circumvention. One controlled by several acting together is far harder to escape — and far harder to hold together politically.
• Second-order exposure. Who else depends on the same node? Chokepoints rarely have clean blast radii, and the states most damaged by an action are frequently not its targets.

The strategic question for any government is not only which chokepoints it holds, but which it sits inside — and how long it would take to get out.

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