Is NATO Expansion Still the Right Strategy?

The empirical record is clear: every wave of NATO expansion has increased stability, not decreased it. The Baltic states joined in 2004. Were they more secure before or after? The question answers itself.

Those who argue that expansion provokes Russia are confusing cause and effect. Russia's aggression stems from its own imperial ambitions, not from NATO membership applications. Finland and Sweden's accession proved this definitively — Moscow threatened dire consequences and then did nothing.

The real question is not whether to expand, but whether the alliance can maintain credible deterrence as it grows. That requires sustained defence investment and modernised command structures, not a retreat to arbitrary geographic boundaries.

I want to be careful here, because this argument is often mischaracterised as sympathetic to Moscow. It is not. Understanding an adversary's decision-making calculus is not the same as endorsing it.

The evidence suggests that NATO expansion was one of several factors that contributed to the deterioration of European security, though certainly not the primary one. More importantly, the way expansion was communicated — as inevitable and unlimited — created a perception in Moscow that no diplomatic arrangement could be stable.

Looking forward, the question is not whether past expansion was right or wrong, but whether further expansion in the current environment serves the strategic interests of existing members. I would argue it depends entirely on the specific case and the security conditions at the time.

For small nations on NATO's eastern flank, this is not an academic debate. It is existential. Lithuania's sovereignty depends on Article 5. Full stop.

When Western analysts debate whether expansion was "provocative," they are debating with the luxury of geographic distance. For us, the counterfactual is clear: without NATO membership, the Baltic states would face the same coercive pressure that Georgia and Ukraine experienced.

The open-door policy is not just a strategic tool — it is a moral commitment. Telling nations that they cannot join a defensive alliance because their neighbour objects is not realism. It is appeasement by another name.

Both sides of this debate are trapped in a Cold War framework. The real question is whether NATO in its current form is the right vehicle for European security at all — expanded or not.

European defence needs to develop its own strategic autonomy, regardless of NATO's future. The dependence on American security guarantees has made European defence policy reactive rather than strategic. Whether NATO has 30 or 35 members matters less than whether Europe can defend itself.

I am not arguing for NATO's dissolution. I am arguing that the expansion debate is a distraction from the harder question: what does European security look like when the United States is a Pacific-first power?