Towards a Nuclear-Weapons-Free World: A Critical Assessment of Feasibility and Geopolitical Implications
Introduction
The vision of a nuclear-weapons-free world (NWFW) has long occupied a prominent place in global disarmament discourse, finding institutional expression in the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), the Comprehensive Nuclear-Test-Ban Treaty (CTBT), and more recently, the Treaty on the Prohibition of Nuclear Weapons (TPNW). However, despite these normative advancements, the feasibility of realizing a NWFW remains contested. Entrenched deterrence doctrines, intensifying strategic rivalries among great powers, and selective commitment to disarmament initiatives have not only inhibited genuine progress but also exacerbated asymmetries in global nuclear governance.
This essay critically assesses both the feasibility and the geopolitical ramifications of pursuing a nuclear-weapons-free world. It interrogates the enduring logic of nuclear deterrence, explores the structural constraints posed by strategic competition among major powers, and evaluates the strengths and limitations of existing disarmament frameworks. It concludes that while the normative appeal of a NWFW is undeniable, its realization is impeded by deep-rooted power-political dynamics and the contradictions within the current international order.
I. Deterrence Doctrine and the Ideological Resilience of Nuclear Weapons
At the heart of resistance to nuclear disarmament is the enduring doctrine of nuclear deterrence, which posits that the threat of mutual assured destruction (MAD) prevents the outbreak of full-scale war between nuclear-armed states. Originating in Cold War bipolarity, this logic has been institutionally and doctrinally embedded in the strategic calculus of states such as the United States, Russia, China, and regional powers like India and Pakistan.
The feasibility of a NWFW under deterrence logic is inherently limited. Kenneth Waltz (1981) famously argued that nuclear weapons bring stability by making war irrational. While this view has been challenged by Scott Sagan’s organizational theory critique—which stresses accident-proneness, miscalculation, and bureaucratic pathologies—the strategic community in nuclear-armed states continues to see nuclear weapons as essential guarantors of national security.
Moreover, the expanded role of nuclear weapons in national security strategies, including notions of limited nuclear war and counterforce postures (e.g., in U.S. Nuclear Posture Reviews), signals a re-legitimization of nuclear arms. This doctrinal hardening undermines disarmament efforts and entrenches the belief that abolition could destabilize the existing global balance of power.
II. Strategic Rivalries and the Constraints of Multipolar Disorder
The post-Cold War international system has evolved into a complex multipolar configuration marked by shifting alliances, rising regional powers, and growing mistrust. Strategic rivalries—particularly between the U.S. and China, the U.S. and Russia, India and Pakistan, and North Korea and the broader international community—undermine the prospects of coordinated disarmament.
The return of great power competition has intensified arms modernization programs. Russia’s development of hypersonic weapons and tactical nuclear warheads, China’s nuclear arsenal expansion, and the U.S.’s strategic triad upgrades reflect a renewed commitment to nuclear deterrence. These developments contradict Article VI of the NPT, which obligates nuclear states to negotiate disarmament “in good faith.”
Further, the erosion of arms control regimes, such as the demise of the INF Treaty in 2019 and the uncertain fate of New START, signals a breakdown in strategic trust among major powers. In this context, disarmament initiatives are increasingly perceived as geopolitical gambits rather than genuine moves towards collective security.
In the Global South, especially in regions like the Middle East and South Asia, perceived asymmetries in global nuclear governance create additional disincentives for disarmament. The nuclear monopoly of the P5 and the exceptionalism afforded to Israel outside the NPT reinforce perceptions of nuclear apartheid, making states more likely to seek nuclear capability as an equalizer rather than renounce it.
III. Disarmament Initiatives and the Normative Push for Abolition
Despite structural constraints, significant normative progress has been achieved in articulating a world without nuclear weapons. The Treaty on the Prohibition of Nuclear Weapons (TPNW), adopted in 2017 and entering into force in 2021, marks a landmark in the humanitarian disarmament movement. Championed by non-nuclear states and civil society organizations such as ICAN, the TPNW rejects deterrence as morally unacceptable and legally codifies a comprehensive ban on nuclear arms.
However, none of the nuclear-armed states nor their NATO allies have signed the TPNW, highlighting the normative-material divide in global disarmament. The treaty’s impact thus remains largely symbolic, useful for norm-building and stigmatization but limited in altering the strategic calculus of nuclear possessors.
Moreover, the Non-Proliferation Treaty (NPT)—while foundational—has been critiqued for its inherent asymmetry. Its three-pillar structure (non-proliferation, disarmament, and peaceful uses of nuclear energy) has failed to deliver meaningful progress on the disarmament pillar, leading to frustration among non-nuclear states. The indefinite extension of the NPT in 1995, without concrete disarmament benchmarks, further eroded its legitimacy in the Global South.
Additionally, nuclear-weapon-free zones (NWFZs) in Latin America, Africa, Southeast Asia, and Central Asia demonstrate regional efforts to promote denuclearization. However, their applicability is limited by regional power dynamics and the non-participation of key nuclear actors in adjacent areas.
IV. Feasibility Conditions and Geopolitical Implications
For a nuclear-weapons-free world to become feasible, several preconditions must be met:
- Strategic parity and trust-building among major powers must precede disarmament. Without mutual confidence, disarmament will be seen as weakening relative power rather than enhancing collective security.
- Universalization and strengthening of legal regimes, including NPT reform and greater adherence to the CTBT, must be prioritized.
- A robust verification and enforcement mechanism, likely through the International Atomic Energy Agency (IAEA) or a new supranational body, is essential to ensure compliance and deter clandestine proliferation.
- Civil society mobilization and norm diffusion—particularly within nuclear-armed democracies—can exert bottom-up pressure for change, as seen in the TPNW campaign.
Geopolitically, achieving a NWFW would represent a fundamental reordering of international power structures. It would undermine the symbolic and material hegemony of nuclear states, democratize global security governance, and enhance the normative authority of non-nuclear states.
However, such transformation would also entail significant risks, including:
- Security vacuums in volatile regions such as South Asia and the Korean Peninsula.
- The potential for latent deterrence—where disarmed states retain the technological capability to rearm.
- Strategic backlash from actors who view nuclear disarmament as a threat to their regional dominance or regime survival.
Conclusion
While the aspiration for a nuclear-weapons-free world remains normatively compelling and is gaining moral traction through instruments like the TPNW, its feasibility is constrained by enduring doctrines of deterrence, intensifying strategic rivalries, and the inadequacies of existing disarmament regimes. The geopolitical implications of disarmament—both emancipatory and destabilizing—highlight the tension between normative ideals and power-political realities.
In the absence of structural reforms to the global order, particularly the democratization of security governance and recalibration of strategic interests, the goal of a nuclear-weapons-free world will remain aspirational. Nevertheless, sustained normative pressure, multilateral diplomacy, and confidence-building initiatives can keep the vision alive and gradually erode the legitimacy of nuclear weapons as tools of power and prestige.
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