The death of NATO

Wednesday 1 April 2026

There are institutions in international affairs whose endurance becomes so assumed that their mortality is scarcely contemplated. The North Atlantic Treaty Organization is one such body. Conceived in the anxious aftermath of the Second World War and formalised in 1949 as a bulwark against Soviet expansion, it has endured through crises, enlargements and reinventions. Yet to speak today of its vitality without qualification is to indulge in a fiction. NATO is not dead in the formal sense; its headquarters in Brussels hums with activity, its communiqués proliferate, its exercises continue. But in a deeper, more structural sense, NATO as it was once understood is passing into history.

The original purpose of NATO was stark and unambiguous: to deter the Soviet Union and, if necessary, to fight a collective war against her. This clarity endowed the alliance with coherence. Article 5 of the North Atlantic Treaty, the famous collective defence clause, was not merely a legal provision but a psychological covenant, underwritten above all by the military supremacy of the United States. Western Europe, exhausted and impoverished, ceded strategic leadership to Washington in exchange for security guarantees that appeared both credible and enduring.

The collapse of the Soviet Union in 1991 ought to have prompted a fundamental reckoning. Instead NATO persisted, expanding eastwards and redefining its mission in increasingly abstract terms: crisis management, cooperative security and the promotion of democratic values. The interventions in the Balkans, particularly in Kosovo, offered a semblance of renewed purpose, but they also revealed a deeper ambiguity. NATO was no longer defending its members against an existential threat; it was projecting power in pursuit of a liberal international order whose contours were themselves contested.

It is in this ambiguity that the seeds of NATO’s present condition were sown. Alliances require not only shared interests but shared perceptions of threat. Without them, they become bureaucratic shells, sustained by inertia rather than necessity. The enlargement of NATO into Central and Eastern Europe, while politically understandable, exacerbated this problem. For newer members such as Poland and the Baltic states the spectre of Russian aggression remained vivid. For others, particularly in Western Europe, the urgency was less acute, filtered through layers of economic interdependence and diplomatic caution.

The resurgence of Russia as a revisionist power, culminating in her full-scale invasion of Ukraine in 2022, might have been expected to restore NATO’s original clarity of purpose. In certain respects, it has done so. Defence budgets have risen, troops have been deployed to the alliance’s eastern flank, and rhetorical unity has been reaffirmed in summit after summit. Yet this apparent revival conceals deeper fractures.

The war in Ukraine has exposed the limits of NATO’s cohesion. It has not intervened directly, constrained by the risk of escalation with a nuclear-armed adversary. Instead support has been channelled bilaterally or through ad hoc coalitions. The United States remains the indispensable actor, providing the bulk of military assistance and strategic direction. But when the United States asked NATO allies to come to her assistance in the currently deeply controversial war against Iran, they declined. The US President is now saying he is considering withdrawing from NATO, although he says a lot of things and it is not the first time he has threatened this. European allies, despite rhetorical commitments to “strategic autonomy”, continue to depend heavily upon American capabilities. This asymmetry is not new, but it has become more conspicuous and, in political terms, more contentious.

Within the United States herself, the consensus underpinning NATO has eroded. The alliance, once regarded as a cornerstone of American foreign policy, is increasingly subject to partisan debate. Questions are asked, with growing frequency, about burden-sharing, about the relevance of European security to American interests, and about the opportunity costs of sustained engagement in a continent that appears unable or unwilling to defend itself. These questions do not yet amount to a repudiation of NATO, but they signal a shift in political mood that cannot be ignored.

Europe, for her part, has struggled to articulate a coherent response. The aspiration to strategic autonomy, most prominently championed by France, reflects a recognition that reliance upon the United States may no longer be tenable. Yet this aspiration remains more rhetorical than real. Defence integration within the European Union proceeds haltingly, constrained by divergent national interests, institutional rivalries and the enduring primacy of NATO as the framework for collective defence.

Meanwhile NATO’s expansion has continued, with countries such as Finland and Sweden joining and others seeking membership. Paradoxically this enlargement both strengthens and weakens the alliance. It extends the geographical scope of collective defence, increasing deterrence in some regions, but it also complicates decision-making and dilutes strategic focus. An alliance of thirty or more members cannot easily achieve the unanimity required for decisive action, particularly when their threat perceptions diverge so markedly.

To speak of the death of NATO therefore is not to suggest an abrupt collapse, but a gradual transformation into something less coherent, less decisive, and ultimately less relevant. It risks becoming a forum for consultation rather than an instrument of action, a symbol of transatlantic solidarity rather than its guarantor. Its military structures will persist, its exercises will continue, but the animating spirit that once gave her purpose is fading.

This transformation carries profound implications. For Europe it raises the spectre of strategic vulnerability. If NATO can no longer be relied upon as the ultimate guarantor of security, then European states must confront the uncomfortable necessity of greater self-reliance. This will require not only increased defence spending, but a willingness to make difficult political choices about integration, sovereignty and the use of force.

For the United States the attenuation of NATO may offer both risks and opportunities. On the one hand, it could reduce the burdens of alliance management and allow for a reorientation of strategic priorities, particularly towards the Indo-Pacific. Yet it may undermine the network of alliances that has long underpinned American global influence, creating a more fragmented and unpredictable international environment.

For Ukraine the implications are immediate and existential. Her struggle against Russian aggression has been sustained by Western support, much of it coordinated through NATO frameworks. If the alliance’s cohesion were to weaken further the flow of assistance could become more uncertain, subject to the vagaries of national politics rather than anchored in a collective commitment.

History rarely offers clean endings. Institutions do not die with the clarity of biological organisms; they decay, adapt, and sometimes endure in altered forms. NATO may yet find a way to redefine its purpose, to reconcile the divergent interests of her members and to restore a measure of strategic coherence. But this will require more than declarations and summits. It will demand a candid recognition of the alliance’s current condition, and a willingness to undertake reforms that have long been deferred.

Until such a reckoning occurs it is not unreasonable to speak of NATO as an institution in decline — not dead, but no longer fully alive in the sense that once made it indispensable. In that ambiguity lies both the danger and the possibility of renewal.