An alliance with fine prints by Kingsley Cobb

The reported decision by the Trump administration to exclude Britain, France and the Baltic states from a Pentagon-led meeting on NATO’s future is not merely another diplomatic quarrel. These are not peripheral countries wandering into the wrong room. They are long-standing members of the alliance, important military contributors and, in the case of the Baltic states, countries living directly beside the security threat NATO was built to deter.

And that is precisely why the symbolism matters. NATO was never supposed to operate like a nightclub where the owner decides who is fashionable enough to enter. Its strength was supposed to come from institutional permanence: an attack on one member concerns all, military planning is shared, commitments survive elections and governments change. The whole point was to make security less dependent on the personality, mood or immediate interests of whoever happened to occupy the White House.

Now that principle increasingly looks negotiable. The emerging American approach appears to favour smaller circles of cooperation built around particular objectives and particular governments. We have already seen the language of coalitions of the willing gaining prominence elsewhere in Washington's foreign policy. The logic is simple enough: work with those who agree, exclude those who hesitate, reward those who cooperate and make everyone else understand that access is conditional.

That may produce faster deals. It may even produce impressive photographs. But security is not a shopping list. A military alliance is valuable precisely because its members cannot easily be separated into today's useful friends and tomorrow's inconvenient ones. The deterrence comes from the expectation that the coalition will still exist when the crisis arrives, not merely when everyone agrees with Washington's latest policy.

There is another problem. Exclusion creates its own politics. If Britain, France or the Baltic countries can be pushed outside an important NATO discussion today because they disagree with Washington on a particular matter, every other ally begins asking the same question: What happens when it is our turn?

That question can be more damaging than any formal withdrawal. Alliances depend not only on weapons, bases and intelligence. They depend on confidence. A country must believe that consultation means something, that its contribution matters and that today's disagreement will not suddenly transform it from ally into suspect.

The danger is therefore not that NATO disappears tomorrow morning. It is something more subtle: NATO becomes hollowed out while remaining perfectly alive on paper.

The irony is almost painful. NATO leaders reaffirmed collective defence and Article 5 at the Ankara summit in July, while the alliance simultaneously committed to a more European contribution to its own defence. NATO Secretary-General Mark Rutte has explicitly described the future as a stronger European role inside a still-transatlantic alliance.

That should be an opportunity for maturity, not fragmentation. Europe is already being pushed toward greater responsibility. Fine. Let Europe carry more of the burden. Let America demand greater defence spending, more ammunition production and stronger European military capabilities. Those are legitimate debates.

But demanding that allies become stronger while treating some of them as second-class participants is a different proposition.

The great historical achievement of Western security was never that Washington could gather a convenient group around a table. It was that countries with different governments, histories and interests built a structure capable of surviving disagreement.

Turn that structure into a collection of temporary friendships and the alliance acquires fine print. And once allies start reading the fine print, deterrence starts becoming a matter of trust. That is a dangerous currency to spend.