Nuclear proliferation — the problem

The use of nuclear weapons in 1945 reshaped global security. Despite a decline in arsenals, the spread of technology and continuing debates over nuclear programmes, energy and WMD terrorism keep proliferation at the centre of world politics.

Framing scholar

Joseph Nye — nuclear weapons have reshaped deterrence dynamics, making their spread a key concern for both strategic stability and global governance since the Cold War.

Spread of WMD technology

• By 1965 → five states had tested: the United States, the Soviet Union, the United Kingdom, France and China.
• 1968 → these five were recognised as nuclear-weapon states under the NPT.
• Early 2020s → nine states possess weapons: the US, Russia, the UK, France, China, India, Pakistan, North Korea and Israel.
• Parallel effort → under the Chemical Weapons Convention (1997), many states chose to destroy their chemical stockpiles.

Desirability of nuclear weapons — schools

Motivations to acquire — two models

Why nations relinquish nuclear weapons

• Realist → states forgo weapons when they receive extended deterrence, the security umbrella of another nuclear power; providing such an umbrella can prevent proliferation.
• Liberal → institutions, treaties and regimes prevent proliferation; the near-universal NPT is a major achievement in deterring acquisition.
• Social constructivist → Nina Tannenwald shows how cultural taboos have evolved since 1945; opinion and new norms explain non-use; treaties may not eliminate weapons but they delegitimise possession and use.

Norms, taboos & proliferation

• Nina Tannenwald → the nuclear taboo; despite its arsenal, the US has not used nuclear weapons since 1945, even in long conflicts, because use is now seen as morally unacceptable. Treaties create a stigma that makes keeping or using weapons harder to justify.
• Scott Sagan (Norms model) → status and prestige, not only security, drive proliferation.
• Alexander Wendt → nuclear weapons are not only military power but a country’s identity and status; the world’s response to states like North Korea and Iran can reshape how they are viewed.

UPSC 2013 — What roles do norms, taboos and epistemic communities play in the context of nuclear proliferation?

Build the answer on

• Constructivist frame → norms and shared beliefs, not only material power, shape nuclear decisions.
• Nina Tannenwald → the nuclear taboo explains US non-use since 1945; treaties create a stigma that delegitimises possession and use.
• Scott Sagan’s Norms model → weapons pursued for status and prestige; Alexander Wendt → weapons express a state’s identity and standing.
• Contrast with the Security model → survival under anarchy drives acquisition (Hans Morgenthau, Kenneth Waltz).
• Normative progress underpins disarmament → changing perceptions are central to global attitudes (Mohamed ElBaradei’s call for universal commitment and mutual trust).

Nuclear deterrence in South Asia

• Hans Morgenthau & Kenneth Waltz → absent a global authority, nuclear weapons are essential for survival.
• John Mearsheimer (offensive realism) → states seek not just defence but control and influence; India’s programme partly asserts power in South Asia and Pakistan’s answers India, so weapons may not prevent war but could raise the likelihood of conflict in a tense region.
• Thomas Schelling & Bernard Brodie → the purpose is a credible threat of massive retaliation, not use; hence the South Asian paradox — weapons may prevent major wars while heightening the risk of devastating escalation. Alexander Wendt → they also carry meaning for identity and status.

The possibility of a new arms race

• Hans Morgenthau & Kenneth Waltz → rising powers (US, Russia, China) are enhancing capabilities; competitive pursuit will lead to a new race.
• Robert Keohane & Joseph Nye → treaties like the NPT and bodies like the UN reduce risk through diplomacy, transparency and trust — but the failure to extend the INF Treaty exposes the limits.
• John Mearsheimer → renewed great-power competition could reignite a race; Francis Fukuyama → evolving global norms might still help avoid one; Alexander Wendt → the response to North Korea and Iran could change how weapons are viewed.

The Ukraine war has drawn comparisons to the 1962 Cuban Missile Crisis. As George Bunn wrote, the crisis catalysed arms control by “awakening American and Soviet interest in seeking accommodation,” yet between 1962 and 1968 the US stockpile grew by almost 16 per cent and Soviet warheads nearly tripled. The US has since suspended the Strategic Stability Dialogue — mistrust chilling arms control even as it shows why the threat must be reduced.

The Non-Proliferation Treaty (NPT)

The NPT, signed in June 1968, sought a non-proliferation regime by preventing non-nuclear states from developing or acquiring weapons.

• Core bargain → nuclear-weapon states commit not to transfer weapons or technology; non-nuclear states commit not to acquire them; peaceful nuclear technology is permitted under IAEA oversight.
• Disarmament provision → calls on nuclear states to reduce arsenals but sets no timeline or enforceable requirement.
• Haves and have-nots → the five permanent UNSC members retain weapons while others refrain — seen by many, India included, as unfair.
• Criticism → perpetuates a power gap, weak on disarmament, failed to stop programmes in France and China, discriminatory.
• Indefinite extension (1995) → a New York conference extended the NPT indefinitely, a diplomatic triumph for the US; NAM challenges were managed by attaching disarmament goals, and the extension prompted the CTBT.

India & the NPT

• India has refused to join, viewing the NPT as an unjust system that lets existing nuclear states build arsenals while excluding India, Pakistan, Israel and North Korea.
• V. C. Trivedi, India’s delegate at the eighteen-nation Disarmament Committee (ENDC, from July 1965), likened the treaty to a seventeenth-century emperor who banned drinking while being a drunkard.
• Resolution 1887 → the UNSC called on outside states to join, but India declared it would not join as a non-nuclear-weapon state, since weapons are integral to its security.
• Third-world critique → the regime is “largely the product of interstate diplomacy dominated by Western great powers” (Barkawi and Laffey); aligning the five nuclear states with the five permanent UNSC seats legitimises nuclear power for a few while prohibiting it for the rest (Biswas); indefinite extension lets nuclear states modernise and pursue vertical proliferation (Singh); the exclusive regime perpetuates “logics of colonial violence, oppression, and inequity” (Biswas and Peterson).
• US–India civil nuclear agreement → lets India access nuclear technology without signing the NPT, meeting energy needs while retaining its capabilities.

CTBT · FMCT · NSG

North–South dimension → from the outset the would-be proliferators targeted by NSG export controls (bar Israel and South Africa) lay in “the South,” shaping Third World attitudes and the critique of the group as an exclusive “cartel.”

Evolution of non-proliferation efforts

Six decades — from sharing to control to counter-proliferation. 1957 (IAEA — share nuclear-energy info) → 1962–63 (Cuban crisis; Partial Test Ban) → 1968 (NPT — five NWS; peaceful use) → 1991–2010 (START, SORT, New START) → 2003–04 (PSI; UNSC 1540) → 2017 (TPNW — ban on humanitarian grounds)

START (1991), SORT (2002) and New START (2010) cut US and Russian warheads and delivery vehicles; the Proliferation Security Initiative (2003) improved cooperation against WMD trafficking; UNSC Resolution 1540 (2004) set legal measures against non-state actors; the Treaty on the Prohibition of Nuclear Weapons (2017) had 86 signatories by 2021. Two forms run throughout → horizontal proliferation (spread to new countries) and vertical proliferation (expansion of existing arsenals); since 1945 the effort has shifted from disarmament to arms control and counter-proliferation.

Trump–Kim Singapore Summit

The denuclearisation of the Korean Peninsula sits at the intersection of the security model, deterrence and the norms around nuclear weapons.

Build the answer on

• North Korea is one of the nine nuclear-armed states and remains outside the NPT.
• Security-model logic → for a state that sees weapons as integral to survival, complete denuclearisation is hard to secure through summitry alone.
• Deterrence → weapons create a credible threat of retaliation (Thomas Schelling, Bernard Brodie), reducing the incentive to give them up.
• Norms and taboo → sustained pressure and stigma (Nina Tannenwald) shift behaviour over time more than one-off deals; identity and status matter (Alexander Wendt).
• Verification is the central obstacle; the peaceful-use loophole (civilian route to military capability) complicates trust.
• Diplomacy over coercion (Robert Keohane, Joseph Nye), but durable denuclearisation needs enforceable, mutual guarantees.

India’s vision on nuclear disarmament

• India has consistently advocated a world free of nuclear weapons, holding disarmament essential for global stability, and supports a universal ban with binding legal frameworks.
• It presses for the full dismantling of weapons — a threat to security, human well-being and the environment — with international oversight to ensure compliance.
• Its posture pairs no first use with a self-imposed testing moratorium since 1998, and calls for open dialogue and confidence-building to reduce reliance on nuclear weapons.

Nuclear proliferation — assessment

• Joseph Nye → nuclear weapons reshaped deterrence, making their spread central to strategic stability and global governance.
• Scott Sagan → “More will be worse” where institutions are weak and rivalries persist; prevention needs coercive diplomacy, arms-control regimes and norm entrepreneurship together.
• Mohamed ElBaradei → a nuclear-weapons-free world depends not merely on treaties but on universal commitment, mutual trust and equitable enforcement, so that disarmament is truly global rather than selective.

“The unleashed power of the atom has changed everything save our modes of thinking, and we thus drift toward unparalleled catastrophe.”

Albert Einstein

The principle affirmed by Ronald Reagan and Mikhail Gorbachev in 1985 — that “a nuclear war cannot be won and must never be fought” — remains the moral bedrock of non-proliferation.

The Arms Race, Nuclear Order and Disarmament

Nuclear weapons still shape power politics, alliances and regional security after the Cold War.

The persistence of deterrence

• Thomas Schelling: coercion as the credible “power to hurt”.
• Mutually Assured Destruction (MAD) as a “balance of terror”, resting on second-strike capability and the nuclear triad, and extended to allies (Japan, South Korea) through extended deterrence.
• Kenneth Waltz: nuclear weapons helped keep the Cold War “cold” — a logic many realists apply to great-power restraint after 1991.
• Henry Kissinger: reliance on deterrence assumes rational actors, which is unsafe.
• Morton Kaplan’s “unit veto” system projects a world where each actor can destroy every other.

Disarmament

Definition

Disarmament is the reduction or elimination of military forces and weapons through cooperation, treaties and oversight. Four components: reduction in quantity; formal negotiation and treaties; focus on weapons and tools; an oversight body. The United Nations has mediated disarmament since the 1960s through resolutions, committees and monitoring.

Armaments make war physically possible and politically probable; disarmament can reduce tension and redirect spending to human welfare. The Arms Trade Treaty seeks to prevent transfers that enable rights violations.

The instruments

John Simpson: the non-proliferation agenda has not worked sufficiently after the 1990s — Iran and North Korea continue to pursue capability; a universal, verifiable and non-discriminatory process is needed for non-proliferation in the short term and disarmament in the long term.

The contemporary nuclear order

• Renewed nuclear competition between the USA and Russia, both modernising arsenals.
• New domains complicate the old idea of an arms race: hypersonic missiles, cyber capabilities and AI for defence.
• China’s expanding arsenal adds a third major actor; regional races persist — India–Pakistan; Iran–Saudi Arabia in West Asia.

Why a nuclear-free world remains distant

• Moral authority has limited effect on states like Iran and North Korea.
• Great-power unanimity is fragile — China has no plans to scrap its weapons.
• Technical verification of warhead elimination is hard.
• A perverse risk: disarmament could turn conventional wars nuclear again, and a weakened US nuclear umbrella could push Japan, South Korea, Taiwan and the Gulf states to reconsider their non-nuclear status (George Perkovich and James Acton).

The Korean Peninsula

• North Korea is a self-declared nuclear power; ICBMs able to reach the US mainland shift the regional balance and undermine the perceived invulnerability of the USA; extended deterrence loses credibility as Seoul and Tokyo doubt the umbrella and move toward self-reliance.
• “The North Korea Paradox” (Max Fisher): US relative strength is paradoxically a weakness — knowing it would lose a full conflict, North Korea’s only option is rapid escalation to nuclear use, which constrains US choices.
• Singapore Summit (June 2018): the first meeting of sitting US and North Korean leaders; a joint statement on security guarantees, new relations and denuclearisation. Symbolic diplomacy versus substantive progress (Scott Snyder); critics warned symbolism is insufficient without concrete steps (Daryl Kimball, Arms Control Association); no clarity on the actual process of denuclearisation (Sue Mi Terry).
• Collapse: the 2019 Hanoi Summit failed over sanctions sequencing; North Korea resumed missile tests in 2019 (Victor Cha). The summit elevated North Korea’s stature without meaningful concessions, at a cost to US non-proliferation credibility (Bruce Klingner).
• The China factor: the only power able to rein in Pyongyang is China — but US–China rivalry makes Beijing likely to keep the North as a strategic buffer; recall the earlier failure of the Six-Party Talks.
• Way forward (Frank Aum): a functionalist “peace by pieces” approach — an end-of-war declaration first, then NPT re-entry, IAEA safeguards and CTBT ratification. Incremental denuclearisation, global sanctions and US–China cooperation; all-or-nothing approaches will fail.

Why disarmament has stalled

• The gains to recall: Cold War strategic parity produced SALT, the ABM Treaty, the hotline and later START — the largest arms-control reductions in history; the non-aligned helped bring about the Partial Test Ban Treaty (1963).
• The reversal: renewed US–Russia competition and modernisation; New START undermined as it nears expiry; great powers taking sides in regional conflicts.
• Regional conflict as disruptor: the Russia–Ukraine war has dismantled the very mechanisms that enabled détente — parity, dialogue and institutions — making fresh cooperation harder than in the 1970s. West Asia: Iran’s programme, Saudi–Iran tensions and external arms supplies; Israel treats Iran’s ambitions as existential. South Asia: the India–Pakistan standoff and periodic missile tests.
• The balance: bloc alignment and treaty erosion have jeopardised past progress, but India’s No First Use and credible minimum deterrence show that restraint remains possible; a verifiable, non-discriminatory, cooperative framework is the way forward.