Sovereignty is often presented as an absolute principle. It sounds clean, moral, and reassuring. Nations have borders, those borders are inviolable, and international law exists to protect them. But the moment you examine how sovereignty actually operates in the real world, the simplicity evaporates.
The principle itself is clear enough. Sovereignty means that a nation’s territorial integrity and political independence cannot be altered by external force. It is the legal bedrock of the modern international system. Without it, there is no stability, only coercion. Every country, large or small, possesses sovereignty equally under the law. Ukraine’s sovereignty is not more valid than Mauritius’s. Britain’s sovereignty is not more valid than Estonia’s. The principle does not distinguish between them.
What does distinguish between them is the response when sovereignty is violated.
If sovereignty alone dictated action, every breach would trigger the same level of outrage and the same level of enforcement. Every unlawful occupation would be reversed with equal urgency. Every violation would provoke equal sanctions, equal diplomatic pressure, and equal willingness to bear economic or military cost. That plainly does not happen, because sovereignty is a legal principle, not a self-enforcing mechanism. Action is determined not only by legality, but by consequence.
Ukraine demonstrates this distinction with brutal clarity. Russia invaded a sovereign state and attempted to annex its territory. The violation was unmistakable, and the Western response was severe. Sanctions were imposed, assets frozen, weapons supplied, and Russia was economically and diplomatically isolated. This was not because Ukraine’s sovereignty is inherently more sacred than anyone else’s, but because the consequences of allowing its destruction would reach far beyond Ukraine itself. It would destabilise the entire European security framework, weaken deterrence, and invite further aggression.
The principle explains why Russia is wrong. Strategy explains why the response is so extensive.
Now consider the Chagos Islands, where the same principle produces a very different outcome. The International Court of Justice ruled that Britain’s continued control of the islands is unlawful. The United Nations General Assembly voted overwhelmingly that sovereignty belongs to Mauritius. Britain, meanwhile, continues to rely on the same international legal order to defend Ukraine’s sovereignty that it ignores in the case of Chagos. The legal framework is treated as binding when Britain invokes it, and advisory when it constrains Britain itself.
The usual justification is strategic necessity. Diego Garcia hosts a critical US military base. Relinquishing sovereignty, we are told, would endanger Western security. But this argument quietly confuses sovereignty with basing rights. Britain could comply with international law, transfer sovereignty to Mauritius, and then support or facilitate the continuation of the US base through a lease agreement with the lawful sovereign. The United States already operates bases in dozens of sovereign countries under precisely such arrangements. Sovereignty and military access are not mutually exclusive. The real issue is not capability. It is control.
Nothing about the principle has changed. Only the strategic calculation has changed.
This is the uncomfortable truth that political rhetoric often conceals. Sovereignty is universal in law, but selective in enforcement. It establishes what is right, but it does not, by itself, determine what states are willing to do. Power, geography, alliances, and consequence determine that.
The inconsistency becomes more obvious when sovereignty is elevated into political doctrine. Nigel Farage built his entire Brexit campaign around the claim that sovereignty was absolute and non-negotiable. Britain, he argued, must leave the European Union entirely, not merely its trade arrangements but its legal and political authority. He spoke explicitly about leaving the EU’s "polity", meaning its sovereign governing structure. Sovereignty was presented not as one factor among many, but as the overriding principle that justified everything else.
Yet when sovereignty belongs to Mauritius, his position shifts. He opposes returning the Chagos Islands, despite the legal rulings. Sovereignty remains sacred when Britain demands it, but becomes negotiable when Britain possesses territory whose loss would diminish its strategic position. The principle itself is unchanged. The willingness to apply it is not.
Donald Trump illustrates the same dynamic from the opposite direction. He does not pretend sovereignty is an absolute rule. He treats it openly as transactional, something to be respected, ignored, or overridden depending on advantage. His proposals to acquire foreign territory and his willingness to threaten allies expose the underlying reality more honestly than those who wrap selective enforcement in the language of universal principle. He does not contradict the doctrine of sovereignty. He reveals its conditional enforcement.
None of this means sovereignty is meaningless. On the contrary, it remains the essential legal framework that allows international order to exist at all. Without it, Ukraine would have no legal claim to its own territory. Without it, small states would have no protection from large ones. The principle is real, and its legal validity does not depend on whether it is enforced.
What it does reveal is that sovereignty alone does not compel action. States respond based on the consequences of violation, not solely on the existence of violation itself. Ukraine’s sovereignty is defended vigorously because its loss would destabilise Europe. Mauritius’s sovereignty over Chagos is acknowledged in law but resisted in practice because of strategic interests. The principle is constant. The response is conditional.
Sovereignty is not a switch that automatically triggers action. It is a rule that nations enforce when they choose to. The law is constant. The choice is political.










