By Karan Bhatia

NEW DELHI, India: Few actions in modern geopolitics carry as much raw, destabilising peril as invoking the spectre of nuclear warfare.

US President Donald Trump’s repeated rhetoric regarding the potential use of overwhelming atomic power against Iran—whether executed directly by the United States military or via regional allies like Israel—represents an extraordinary breach of international norms.

By treating nuclear weapons not as an unthinkable last resort, but as a casual political tool, bargaining chip, or instrument of total destruction, this posturing recklessly chips away at the fundamental pillars of global non-proliferation.

The language emerging from the highest levels of American leadership reflects a alarming shift toward unconstrained brinkmanship.

Addressing reporters and issuing sweeping statements, Trump has repeatedly raised the threat of total annihilation, warning that Iran could be "taken out in one night" and asserting that "nuclear weapons are the greatest single threat... to the entire world," even while keeping military strikes openly on the table.

In a stark post on Truth Social, he went so far as to write that "a whole civilisation will die tonight, never to be brought back again... I don't want that to happen, but it probably will," framing complete devastation as a plausible outcome.

Lowering the Operational Threshold

The primary danger of normalizing nuclear threats lies in the erosion of the historic "nuclear taboo"—the unwritten international rule that has prevented the operational use of atomic weapons since 1945.

When a world power hints at using nuclear capabilities in a regional conflict, it blurs the line between conventional military engagement and total strategic annihilation.

This rhetoric is particularly hazardous regarding low-yield, "tactical" nuclear weapons. Modern defense planning frequently envisions smaller, theater-level atomic munitions as controllable options for destroying hardened underground facilities.

However, deploying even a tactical warhead shatters the threshold of first-use. Once the atomic line is crossed, signal clarity dissolves, leaving targeted states and their allies with an intense "use-it-or-lose-it" incentive that can escalate local strikes into full-scale strategic exchanges.

Global leaders have sounded urgent warnings against this escalation trajectory. UN Secretary-General António Guterres cautioned that nuclear rhetoric and preemptive military force create "a direct threat to international peace and security" with a high risk of conflict rapidly spiraling "with catastrophic consequences for civilians, the region, and the world".

Similarly, European Union Foreign Policy Chief Kaja Kallas urged all sides to "step back, return to the negotiating table and prevent further escalation".

Within the U.S. Congress, lawmakers warned that explicit threats against civil infrastructure and whole populations represent "a threat to commit a war crime" that "shocks the conscience" and fundamentally lowers the barrier for state violence.

Igniting an Uncontrolled Proliferation Domino Effect

If the United States or an ally were to carry out a nuclear strike against a non-nuclear-armed state, the clear message to the rest of the world would be catastrophic: conventional defense, diplomacy, and international law are insufficient guarantees of national survival.

Only a nuclear deterrent can secure sovereignty against an atomic-armed adversary.

Non-proliferation analysts have highlighted how quickly such actions disintegrate long-term stability. Kelsey Davenport, Director for Nonproliferation Policy at the Arms Control Association, warned that heightened existential threats drive countries to treat nuclear material as their sole survival insurance, creating acute risks that stockpiles will be diverted into "a covert program or stolen by a faction... that wanted to retain the option of weaponization".

Because nuclear physics and atomic weapon architecture are essentially eighty-year-old engineering concepts, any state actor with moderate industrial capability, adequate funding, and strong political motivation can assemble basic fission devices and ballistic delivery systems.

An actualized nuclear attack against Iran would instantly convince middle powers across the Middle East, East Asia, and beyond to initiate active nuclear breakout programs.

A world in which dozens of regional powers hold atomic weapons on hair-trigger alert would convert the global strategic landscape into a precarious powder keg.

Dismantling the Global Security Architecture

Beyond the immediate risk of physical fallout, normalizing nuclear threats completely guts multilateral frameworks like the Nuclear Non-Proliferation Treaty (NPT).

Non-nuclear states agree to forego atomic arsenals in exchange for negative security assurances—commitments from established nuclear powers that they will not face nuclear strikes.

Former nuclear weapons inspectors, including David Albright of the Institute for Science and International Security, have noted that destroying or threatening nuclear infrastructure under explosive conditions risks catastrophic regional fallout while destroying the diplomatic mechanisms required to audit and verify materials.

Discarding international assurances replaces diplomatic verification with raw deterrence. In an environment governed solely by existential fear, arms control treaties collapse, intelligence-sharing degrades, and crisis management windows shrink from days to minutes.

Restoring global stability requires an unambiguous recommitment to non-proliferation protocols, ensuring that nuclear weapons remain entirely beyond the boundaries of acceptable geopolitical discourse.

*Karan Bhatia is a political observer of South Asian and Indo-Pacific affairs based in New Delhi.*