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Subject: International Relations | Published: 13 November 2025

The nuclear ban treaty (tpnw) in a world of renewed risks: a UPSC deep dive

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The Global Nuclear Dilemma: A New Chapter

For over seven decades, the specter of nuclear annihilation has loomed over humanity, a veritable Sword of Damocles held by the thinnest of threads. In a landmark effort to sever this thread, the international community adopted the Treaty on the Prohibition of Nuclear Weapons (TPNW), which entered into force on January 22, 2021. This treaty represents the most ambitious step towards nuclear abolition, shifting the narrative from arms control to outright prohibition. However, its journey is fraught with paradoxes, especially in a world witnessing a resurgence of great power competition and the fraying of established arms control agreements.

###Decoding the TPNW: What Does It Prohibit?

The TPNW is the first international treaty to make nuclear weapons illegal, placing them in the same category as chemical and biological weapons. Its core objective is to establish a powerful international norm against the possession and use of these catastrophic arms. It goes significantly beyond the older Treaty on the Non-Proliferation of Nuclear Weapons (NPT), which permits five states to possess them while committing to eventual disarmament.

Analogy: The No-Trespassing Sign Think of the TPNW as a giant ‘No Trespassing’ sign erected by the global community on the property of nuclear weapons. While the owners of the property (the nuclear-armed states) have ignored the sign, it clearly signals to everyone else that the area is dangerous and off-limits, stigmatizing anyone who remains inside.

Core Prohibitions Under the TPNW

Prohibition CategorySpecific Actions Banned
Development & ProductionDevelop, test, produce, manufacture, or otherwise acquire nuclear weapons.
Possession & StockpilingPossess or stockpile nuclear weapons or other nuclear explosive devices.
Transfer & ControlTransfer to any recipient whatsoever nuclear weapons.
Use & Threat of UseUse or threaten to use nuclear weapons.
Stationing & DeploymentAllow any stationing, installation, or deployment of nuclear weapons in its territory.
Assistance & EncouragementAssist, encourage, or induce anyone to engage in any prohibited activity.

UPSC Prelims Mnemonic To remember the core prohibitions of the TPNW (Develop, Test, Possess, Use, Station, Transfer, Assist), use the phrase: “Don’t Think Peaceful Usage Stops Terrorist Actions.”

The New Geopolitical Reality: TPNW in an Era of Tension

The optimism surrounding the TPNW’s entry into force has been severely tested by recent global events. The primary focus for any UPSC aspirant must be this updated scenario.

In a seismic blow to arms control, Russian President Vladimir Putin announced in February 2023 the suspension of Russia’s participation in the New START (Strategic Arms Reduction Treaty). This was the last remaining bilateral nuclear arms control pact between the US and Russia, limiting their deployed strategic warheads. While Russia stated it would continue to observe the treaty’s limits for now, the suspension dismantled the crucial verification and inspection mechanisms, plunging the future of arms control into uncertainty. This action has amplified nuclear risks and emboldened arguments that in a dangerous world, nuclear deterrents are more necessary than ever—a direct challenge to the TPNW’s ethos.

Further reinforcing the treaty’s relevance and the growing divide, the Second Meeting of States Parties to the TPNW was held in New York from November 27 to December 1, 2023. The participating states issued a powerful declaration condemning all nuclear threats as violations of international law and questioning the morality and sustainability of nuclear deterrence. This meeting highlighted the treaty’s growing institutional strength, focusing on victim assistance, environmental remediation, and establishing a Scientific Advisory Group to guide its implementation.

Statistic of Concern As of early 2024, the world’s nine nuclear-armed states possessed a combined total of approximately 12,100 nuclear warheads, with about 9,585 in military stockpiles for use by missiles, aircraft, and submarines.

The Great Divide: Supporters vs. Opponents

The global nuclear order is now split into two distinct camps:

  1. The Proponents (The Global South & Non-Aligned): A majority of the world’s nations support the TPNW. They argue from a humanitarian perspective, emphasizing the catastrophic consequences of any nuclear detonation. They believe the TPNW creates a powerful norm that will gradually make nuclear weapons illegitimate and politically costly to possess.

  2. The Opponents (Nuclear Powers & Allies): The nine nuclear-armed states (US, Russia, China, UK, France, India, Pakistan, Israel, North Korea) and their allies under the nuclear umbrella (like NATO countries, Japan, South Korea) vehemently oppose the treaty. Their primary argument is rooted in the theory of nuclear deterrence—the idea that possessing nuclear weapons prevents large-scale conventional war between major powers. They argue the TPNW ignores the security realities that compel them to retain these arsenals and lacks any verification mechanism.

India’s Principled Stand: A Third Way?

India has been a consistent and vocal opponent of the TPNW since its inception, choosing not to participate in the negotiations. India’s position, as articulated by the Ministry of External Affairs, is clear: New Delhi cannot be a party to a treaty it did not negotiate and will not be bound by any of its obligations.

India’s key arguments are:

  • Non-Universal and Discriminatory: The treaty does not include any of the nuclear-armed states and therefore does not represent a global norm or contribute to customary international law.
  • Lack of Verification: It lacks the robust, verifiable disarmament mechanisms that India considers essential for any meaningful nuclear treaty.
  • Alternative Forum: India believes the Conference on Disarmament (CD) in Geneva is the sole multilateral forum for such negotiations and advocates for a comprehensive, verifiable Nuclear Weapons Convention (NWC) that is negotiated by all states on a consensus basis.

Fun Fact: The Nuclear Football The “nuclear football” is a briefcase, officially known as the Presidential Emergency Satchel, that always accompanies the President of the United States. It doesn’t contain a red button, but rather communication tools and a book of pre-selected war plans, enabling the president to authorize a nuclear strike while away from command centers.

Critical Policy Appraisal

Challenges/Criticisms of the TPNWOpportunities/Successes/Way Forward
Absence of Nuclear Powers: The refusal of all nine nuclear-armed states to join renders it symbolic in terms of actual arsenal reduction.Powerful Norm-Building: Successfully stigmatizes nuclear weapons, similar to treaties on landmines and cluster munitions, influencing policy in non-nuclear states.
Undermining Deterrence: Opponents argue it weakens the nuclear deterrence that has arguably prevented major power wars for decades.Focus on Humanitarian Impact: Shifts the discourse from abstract security doctrines to the real, catastrophic human and environmental cost of nuclear war.
No Verification Mechanism: Lacks the technical and institutional framework to verify the dismantlement of nuclear arsenals.Empowers Non-Nuclear States: Provides a platform for the majority of the world’s nations to have a legitimate voice in the disarmament debate.
Divides the Global Order: Creates a rift between the nuclear ‘haves’ (and their allies) and the ‘have-nots’, potentially weakening consensus on non-proliferation.Strengthens the NPT’s Goal: Supporters argue it fulfills the spirit of Article VI of the NPT, which calls for good-faith negotiations towards complete disarmament.

** Analytical Lens: UPSC Focus (Mains & Prelims)**

Conceptual Basis: The primary legal instrument is the Treaty on the Prohibition of Nuclear Weapons (TPNW), 2017. It must be studied in contrast with the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), 1968, which forms the cornerstone of the existing non-proliferation regime.

UPSC Integration: Connecting the Dots

  • GS Paper 2 (Polity & International Relations): This is a core topic covering India’s foreign policy, disarmament, international treaties, the role of the UN, and the challenges to the global order.
  • GS Paper 3 (Security): Directly relates to India’s security challenges, its nuclear doctrine (‘Credible Minimum Deterrence’ and ‘No First Use’), and the security architecture in its neighborhood.
  • GS Paper 4 (Ethics, Integrity, and Aptitude): The debate around nuclear weapons is a profound ethical dilemma. Questions can be framed around the morality of possessing weapons of mass destruction, the concept of deterrence vs. humanitarian law, and the ethical responsibility of scientists and political leaders.

Future Impact & Policy Relevance: The TPNW, despite the absence of nuclear powers, is not merely symbolic. Its real power lies in norm entrepreneurship. Over time, it can make it increasingly difficult for financial institutions to invest in companies involved in nuclear weapon production and for allied states to justify hosting nuclear weapons on their soil. The growing schism between the TPNW supporters and the nuclear-armed states will be a defining feature of international security politics for the foreseeable future. For India, maintaining its strategic autonomy while navigating this divide will be a key foreign policy challenge.

Prelims Practice MCQ:

Question: India did not sign the Treaty on the Prohibition of Nuclear Weapons (TPNW). Which of the following is the most accurate reason for India’s official position?

a) India believes the treaty violates its sovereign right to self-defense. b) The treaty’s verification protocols were deemed too intrusive by India. c) India advocates for a step-by-step, verifiable disarmament process within the Conference on Disarmament, which the TPNW bypasses. d) India is bound by the NPT to not sign any other treaty concerning nuclear weapons.

Explanation: The correct answer is (c). India’s official and consistent position is that it supports universal, non-discriminatory, and verifiable nuclear disarmament. It argues that the TPNW is a parallel initiative that bypasses the established, consensus-based multilateral forum, the Conference on Disarmament (CD), where India has long advocated for negotiating a comprehensive Nuclear Weapons Convention. Option (a) is too general. Option (b) is incorrect because a major criticism is the lack of verification protocols. Option (d) is incorrect as India is not a signatory to the NPT.

Mains Sample Question (15 Marks):

“The Treaty on the Prohibition of Nuclear Weapons (TPNW) represents a fundamental clash between humanitarian principles and the established doctrines of nuclear deterrence. In light of recent geopolitical developments, critically analyze the effectiveness and relevance of the TPNW in achieving global nuclear disarmament. What are the key reasons behind India’s refusal to join the treaty?”

Mind Map Outline (Revision Structure)

  • Treaty on the Prohibition of Nuclear Weapons (TPNW)
    • Core Identity & Purpose
      • Entered into force: January 22, 2021
      • Goal: Comprehensive prohibition and elimination of nuclear weapons.
      • Legal Status: First legally binding instrument to ban nuclear weapons.
    • Key Provisions & Prohibitions (Article 1)
      • Development, Testing, Production
      • Possession, Stockpiling
      • Use or Threat of Use
      • Stationing & Deployment
      • Assistance or Encouragement
    • The Contemporary Geopolitical Context (Post-2022)
      • Erosion of Arms Control Architecture
        • Russia’s suspension of the New START Treaty (February 2023).
        • Increased nuclear rhetoric and modernization programs globally.
      • TPNW’s Institutional Growth
        • First Meeting of States Parties (Vienna, 2022)
        • Second Meeting of States Parties (New York, 2023)
          • Declaration against nuclear deterrence.
          • Focus on victim assistance and environmental remediation.
    • The Global Debate: A Divided World
      • Arguments for TPNW (Proponents)
        • Humanitarian Imperative
        • Norm-Building and Stigmatization
        • Fulfilling NPT’s Article VI
      • Arguments Against TPNW (Opponents)
        • Doctrine of Nuclear Deterrence
        • Ignores Security Realities
        • Lack of Verification Mechanisms
        • Key Opponents: P5, India, Pakistan, Israel, North Korea, NATO.
    • India’s Stance
      • Principled Opposition
        • Did not participate in negotiations.
        • Not bound by its obligations.
      • Core Reasons for Rejection
        • Bypasses the Conference on Disarmament (CD).
        • Not universal or non-discriminatory.
        • Advocates for a comprehensive Nuclear Weapons Convention (NWC).
    • UPSC Analytical Framework
      • Constitutional/Legal Basis: TPNW (2017) vs. NPT (1968).
      • Inter-Topic Linkages:
        • GS-2: Foreign Policy, International Treaties
        • GS-3: Security, Nuclear Doctrine
        • GS-4: Ethical Dimensions of WMD
      • Policy Critique & Future Outlook:
        • Challenges: Lack of P5 buy-in.
        • Opportunities: Normative power, humanitarian focus.

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