WHETHER an unequal atomic order can remain legitimate is a central question in international relations and security studies, specifically regarding the Nuclear Non-Proliferation Treaty (NPT). The NPT creates an unequal structure by dividing the world into nuclear “haves” (countries that tested nuclear weapons before 1967) and “have-nots” (everyone else).
As threats of military action against Iran intensify from both the United States and Israel, the world confronts a profound contradiction at the heart of the global nuclear order. Israel — widely believed to possess between 80 and 90 nuclear warheads, though it officially maintains ambiguity — warns that Iran must never acquire nuclear weapons capability. The United States, possessing more than 5,000 nuclear warheads and protected by the most sophisticated nuclear triad in history, echoes the same demand.
The question is no longer merely whether Iran seeks nuclear weapons. The deeper question is whether an international order built upon unequal nuclear possession can retain moral or legal legitimacy.
Why are some states permitted to possess civilisation-ending weapons indefinitely while others are threatened, sanctioned, or bombed for seeking similar capabilities? If nuclear weapons are fundamentally immoral and destabilising, why are they accepted in the hands of a few powerful states? But if they are indispensable for national security, on what principle can weaker nations be permanently denied them? Nuclear weapons are treated as a “currency” of power, allowing holders to dominate international relations and dictate terms to non-nuclear nations.
The current confrontation with Iran exposes the fault lines of the nuclear age more sharply than ever before. Recent military threats and strikes by the United States and Israel against Iranian nuclear infrastructure have once again demonstrated that nuclear policy is governed less by universal legal principles than by geopolitical power. Iran has faced heavy scrutiny and sanctions for its nuclear technology, while Israel, a non-NPT member, operates with opacity and little international pressure.
The Silence Beneath the Nuclear Umbrella
At the centre of this debate lies the idea of the “nuclear umbrella” – the system through which allied states receive nuclear protection without possessing nuclear weapons themselves. Countries such as Japan, Germany, South Korea, Belgium, and Italy rely upon the American nuclear deterrent for their security. In effect, they benefit from nuclear protection while remaining officially non-nuclear states.
Yet this arrangement raises another troubling reality: the global order does not seek to abolish nuclear dependence. It merely regulates who may legitimately possess it. We might refer to this as the ‘Politics of Nuclear Permission’. Or to put it crudely: ‘Deterrence for Some, Discipline for Others’.
The modern nuclear order is built on a paradox. A handful of states possess the most destructive weapons in human history, while most of the world is expected to permanently abstain from acquiring them. Yet many non-nuclear states still live under what is called a “nuclear umbrella” — a strategic arrangement in which a nuclear-armed ally promises to defend them with nuclear retaliation if necessary.
This system has shaped global security since the end of the Second World War. It explains why countries such as Japan, South Korea, Germany, Belgium, Italy, and several NATO states do not possess nuclear weapons despite having the technological capacity to build them. They rely instead on the protection of the United States’ nuclear arsenal. In effect, these nations participate in nuclear deterrence without directly owning nuclear bombs.
The United States currently possesses approximately 5,000–5,200 nuclear warheads, with around 1,700–1,800 deployed and operational. Russia possesses a comparable number. China’s arsenal is expanding rapidly. Israel — though officially undeclared as a nuclear power — is widely estimated to possess between 80 and 90 nuclear warheads. India and Pakistan maintain smaller but significant nuclear stockpiles. North Korea has developed a limited but growing capability.
This unequal distribution of nuclear power raises a profound question: can an international order based on unequal possession of ultimate destructive power remain morally, politically, or legally legitimate?
The Architecture of Nuclear Inequality
The central legal framework governing nuclear weapons is the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), which entered into force in 1970. The treaty recognises only five states as legitimate nuclear-weapon powers: the United States, Russia, China, France, and the United Kingdom. These were states that tested nuclear weapons before January 1, 1967.
Under the treaty, non-nuclear states agreed not to acquire nuclear weapons, while nuclear states committed themselves under Article VI to pursue negotiations toward disarmament.
However, critics argue that the NPT institutionalised a permanent hierarchy. It effectively divided the world into “nuclear haves” and “nuclear have-nots.” While non-nuclear states accepted strict inspections and controls, the nuclear powers retained their arsenals and modernised them continuously.
The contradiction is stark. Nuclear weapons are considered too dangerous for most of humanity to possess – but apparently acceptable for a few states to indefinitely retain.
This asymmetry has long generated accusations of hypocrisy. The same states that insist on non-proliferation frequently invest billions into upgrading their own arsenals. The United States, Russia, and China are all engaged in modernisation programmes involving submarines, hypersonic delivery systems, tactical nuclear weapons, and missile defences.
For many countries in the Global South, this resembles not universal security but nuclear privilege.
The Logic of the Nuclear Umbrella
Supporters of nuclear umbrellas argue that they actually prevent proliferation. Japan and Germany, for instance, likely possess the scientific and industrial capacity to develop nuclear weapons within months if they chose to do so. Yet they remain officially non-nuclear because they trust extended deterrence arrangements with the United States.
In theory, the umbrella reduces incentives for independent nuclear programmes. It creates stability by assuring allies that they need not develop their own bombs.
But this logic contains another contradiction. A state under a nuclear umbrella still benefits from the threat of nuclear annihilation directed at adversaries. The moral burden of deterrence is outsourced rather than eliminated.
In practical terms, the umbrella system globalises nuclear dependence. It does not dismantle the nuclear order; it deepens reliance upon it.
Moreover, the credibility of such umbrellas is constantly questioned. Would the United States really risk New York or Washington to defend Taiwan, South Korea, or a Baltic state? During the Cold War, this dilemma was summarised bluntly: “Would America trade Boston for Berlin?”
The uncertainty surrounding extended deterrence often drives allies to reconsider independent nuclear capabilities during moments of geopolitical instability.
Morality of Deterrence
The legal status of nuclear weapons remains deeply contested. In 1996, the International Court of Justice issued an advisory opinion stating that the threat or use of nuclear weapons would generally be contrary to international humanitarian law because such weapons cannot distinguish adequately between civilians and combatants.
The ICJ stopped short of declaring nuclear weapons illegal in all circumstances, particularly in extreme cases of self-defence where a state’s survival is at stake. Yet the opinion exposed a tension at the heart of deterrence theory: the credibility of deterrence depends upon the willingness to commit mass destruction.
Deterrence works only if the threat is believable. Therefore, nuclear powers maintain strategies that imply readiness to inflict catastrophic civilian casualties if attacked.
Critics argue that nuclear weapons violate the foundational principles of international humanitarian law. These principles were developed precisely to place limits on warfare, even during armed conflict, and to preserve a minimum standard of human morality amid violence.
The first principle is distinction — the obligation to distinguish between combatants and civilians. Nuclear weapons, by their very nature, cannot make such distinctions. A nuclear detonation over a populated city destroys military personnel, civilians, hospitals, schools, infrastructure, and ecosystems simultaneously. The bomb does not recognise innocence. The destruction of Hiroshima and Nagasaki demonstrated that the overwhelming victims of nuclear warfare are ordinary human beings: children, workers, the elderly, patients, and entire civilian communities.
The second principle is proportionality. International law prohibits attacks in which civilian harm would be excessive in relation to the anticipated military advantage. Yet nuclear weapons are inherently disproportionate. Even a so-called “limited” nuclear exchange could kill hundreds of thousands within hours and trigger long-term radiation effects, famine, displacement, and ecological devastation across borders. Modern thermonuclear weapons are many times more destructive than those used in 1945. Their effects are not confined to battlefields or national frontiers; they threaten humanity itself.
The third principle is the prohibition against unnecessary suffering. Radiation poisoning, genetic damage, cancers, birth deformities, psychological trauma, and environmental contamination continue long after the initial explosion. Survivors of Hiroshima and Nagasaki — the Hibakusha — carried the scars of nuclear warfare for decades. Nuclear violence therefore extends beyond immediate death; it condemns future generations to inherited suffering.
From this perspective, the doctrine of nuclear deterrence rests upon a deeply troubling ethical paradox. Deterrence claims to preserve peace by threatening catastrophe. Its credibility depends not merely on possessing nuclear weapons, but on convincing adversaries that one is willing to use them. In effect, global security is maintained through the permanent readiness to commit mass destruction.
This creates what many ethicists describe as a condition of organised moral contradiction. States publicly uphold humanitarian law, human rights, and civilian protection while simultaneously maintaining military doctrines based upon the possible annihilation of entire populations. Nuclear deterrence therefore becomes more than a strategic doctrine; it becomes a permanent suspension of moral consistency in international politics.
Israel, Ambiguity, and Selective Enforcement
Israel’s nuclear posture illustrates another layer of inequality. Israel has never officially acknowledged possessing nuclear weapons, yet its arsenal is widely accepted as an open secret.
Unlike Iran, Israel is not a signatory to the NPT and is therefore not subject to the same inspection regime imposed on Tehran. Critics argue that Western powers apply nuclear norms selectively: hostile states face sanctions and threats, while allies enjoy strategic ambiguity and protection.
This selective enforcement weakens the legitimacy of the global non-proliferation regime. States observing these double standards often conclude that nuclear policy is shaped less by universal principles than by geopolitical alliances.
The issue is not merely legal inconsistency; it is political credibility.
Defenders of the current system argue that imperfect stability is preferable to uncontrolled proliferation. They claim that widespread nuclear acquisition would dramatically increase the risks of miscalculation, accidents, regional arms races, and nuclear terrorism.
There is truth in this concern. The world has survived several near-catastrophic nuclear crises already: the Cuban Missile Crisis, false alarm incidents during the Cold War, and repeated Indo-Pakistani confrontations.
Yet legitimacy cannot rest indefinitely upon fear alone.
A nuclear order based on permanent inequality eventually corrodes the very norms it seeks to defend. When some states reserve exceptional rights for themselves while denying them to others, resentment and mistrust deepen. International law appears selective rather than universal.
The central moral contradiction persists: if nuclear weapons are indispensable for security, why should only a few possess them? But if they are fundamentally immoral and catastrophic, why should any state retain them?
That unresolved contradiction lies at the heart of the nuclear age.
Beyond Deterrence
The adoption of the Treaty on the Prohibition of Nuclear Weapons by many non-nuclear states reflects growing frustration with the slow pace of disarmament. Though nuclear powers have largely rejected the treaty, it represents an effort to stigmatise nuclear weapons in the same way chemical and biological weapons were delegitimised.
Whether such efforts succeed remains uncertain. But one reality is increasingly clear: humanity continues to live under a global security structure that depends upon the threat of collective suicide. Nuclear umbrellas may temporarily stabilise alliances, but they do not resolve the ethical and political contradictions of nuclear inequality.
The world has normalised a condition in which a few states claim the right to destroy civilisation in the name of preserving peace.
That may be strategic reality. But legitimacy is another matter entirely.
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Ranjan Solomon is a writer, researcher and activist based in Goa. He has worked in social movements since he was 19 years of age. The views expressed here are the author’s own and Clarion India does not necessarily share or subscribe to them. He can be contacted at ranjan.solomon@gmail.com
