Sovereignty vs. Global Security: Do States Have a Legal Right to Develop Nuclear Weapons?

Adediran Babajide, President/CEO
Carlsron Initiative for Peace and Human Rights (CIPEHR)

 

 

 

Keywords: Nuclear weapons; sovereignty; global security; NPT; Iran; deterrence; non-proliferation; international law; constructivism; nuclear inequality

 

Abstract

The question of whether states possess a legal right to develop nuclear weapons lies at the intersection of sovereignty, international law, and global security. This article examines the tension between state sovereignty and collective security obligations through a combined legal and theoretical analysis. Drawing on realism, liberal institutionalism, and Constructivism, it evaluates the legal framework governing nuclear weapons, particularly the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), and the advisory opinion of the International Court of Justice. The article argues that no explicit universal legal right exists for states to develop nuclear weapons; instead, a contested space emerges shaped by power asymmetries, institutional constraints, and normative perceptions. Using Iran as a case study, the analysis highlights how legal ambiguity and political selectivity undermine the legitimacy of the global nuclear order. The article concludes by advocating for a more equitable and normatively coherent framework for nuclear governance.

 

Introduction

Since the emergence of nuclear weapons during World War II, the international system has struggled to reconcile the sovereign rights of states with the imperative of maintaining global peace and security. Nuclear weapons represent an unprecedented category of military capability whose destructive power transcends borders, raising fundamental legal, ethical, and political questions. Among these, the most enduring is whether states possess a legal right to develop such weapons.

The principle of sovereignty, central to international law, suggests that states retain the authority to determine their own security strategies. However, this principle is increasingly constrained by collective security frameworks established under the United Nations system. The development and possession of nuclear weapons amplify this tension, as the pursuit of national security by one state may threaten the survival of others.

This article explores whether international law recognizes a legal right for states to develop nuclear weapons. It adopts a doctrinal legal approach complemented by theoretical perspectives from realism, liberalism, and constructivism. It argues that the absence of a clear prohibition does not equate to a legal right, and that the global nuclear order is shaped as much by power and norms as by legal rules.

 

Conceptual Foundations

State sovereignty has traditionally been understood as the supreme authority of a state within its territory, coupled with the principle of non-interference. However, the evolution of international law has introduced limitations on sovereignty, particularly in areas concerning global security and humanitarian protection (Krasner, 1999). Nuclear weapons, by their very nature, challenge the adequacy of traditional sovereignty, as their use would have catastrophic consequences extending beyond national borders.

The concept of global security, institutionalized through the United Nations, reflects the recognition that peace is a collective good. Nuclear weapons complicate this framework by introducing a paradox: while they may deter conflict, they also create the risk of unprecedented destruction. This duality lies at the core of the debate over their legality.

 

Theoretical Framework

Realism provides a foundational explanation for why states pursue nuclear weapons. In an anarchic international system, states prioritize survival and seek to maximize their security. Nuclear weapons, as instruments of deterrence, offer a powerful means of ensuring national survival (Mearsheimer, 2001). From this perspective, the development of nuclear weapons is a rational response to perceived threats.

Liberal institutionalism, in contrast, emphasizes the role of international institutions and legal frameworks in mitigating conflict. The Treaty on the Non-Proliferation of Nuclear Weapons represents a central pillar of this approach, aiming to prevent the spread of nuclear weapons while promoting peaceful uses of nuclear energy. However, the effectiveness of such regimes depends on compliance and the perceived fairness of their provisions (Sagan & Waltz, 2013).

Constructivism adds a critical dimension by focusing on norms, identity, and legitimacy. Nuclear weapons are not merely material assets but symbols of status and power. The distinction between “legitimate” and “illegitimate” nuclear states is socially constructed, influencing how international law is interpreted and enforced (Wendt, 1999; Finnemore & Sikkink, 1998).

Together, these perspectives reveal that the nuclear order is shaped by an interplay of power, institutions, and norms. This synthesis is essential for understanding the ambiguities inherent in the legal framework governing nuclear weapons.

 

Legal Framework Governing Nuclear Weapons

The Treaty on the Non-Proliferation of Nuclear Weapons remains the cornerstone of the global nuclear regime. It establishes a threefold objective: preventing proliferation, promoting disarmament, and facilitating the peaceful use of nuclear energy. While Articles I and II prohibit the transfer and acquisition of nuclear weapons by non-nuclear-weapon states, Article IV affirms their “inalienable right” to peaceful nuclear technology.

This dual structure creates inherent tension. The same technologies used for civilian purposes can also be applied to military ends, making the distinction between peaceful and non-peaceful use difficult to enforce. As a result, the NPT does not explicitly grant a right to develop nuclear weapons but also does not impose a universal prohibition.

The advisory opinion of the International Court of Justice in 1996 further illustrates this ambiguity. The Court concluded that the threat or use of nuclear weapons would generally violate international humanitarian law, yet it could not definitively rule on their legality in extreme circumstances of self-defense. This leaves a significant gap in the legal framework.

Customary international law offers little clarity. State practice remains divided, and there is no consensus (opinio juris) establishing a universal prohibition. Consequently, the legality of nuclear weapons development remains contested.

 

Do States Have a Legal Right to Develop Nuclear Weapons?

Arguments in favor of a legal right often rely on sovereignty and the inherent right of self-defense under Article 51 of the UN Charter. Proponents contend that, in the absence of an explicit prohibition, states retain the freedom to develop nuclear weapons as a means of ensuring their security. This view aligns with realist assumptions about the necessity of deterrence.

Opposing arguments emphasize the constraints imposed by the NPT and the broader normative framework of non-proliferation. Non-nuclear-weapon states have voluntarily accepted limitations on their ability to develop nuclear weapons, reflecting a commitment to collective security. From a liberal perspective, adherence to these commitments is essential for maintaining international order.

Constructivist insights highlight the distinction between legality and legitimacy. Even if the development of nuclear weapons is not explicitly prohibited, it may still be viewed as illegitimate within the prevailing normative framework. This distinction helps explain why similar actions by different states are treated differently.

Ultimately, the legal framework does not provide a definitive answer. Instead, it reflects a compromise between competing interests, leaving room for interpretation and contestation.

 

Inequality in the Global Nuclear Order

The global nuclear regime is characterized by structural inequality. A small group of states is recognized as legitimate possessors of nuclear weapons, while others are prohibited from acquiring them. This arrangement reflects historical and political realities rather than universal legal principles.

Such inequality has led to criticisms of “nuclear apartheid,” where power asymmetries are institutionalized within the legal framework. Selective enforcement of non-proliferation norms further undermines the legitimacy of the system, as similar actions are treated differently depending on the state involved.

 

Case Study: Iran

Iran provides a compelling case study for examining the tension between sovereignty and global security. As a signatory to the NPT, Iran maintains that it has the right to develop nuclear energy for peaceful purposes. This position is grounded in Article IV of the treaty, which affirms the right of all parties to access nuclear technology for civilian use.

However, Iran’s nuclear program has been the subject of intense international scrutiny and controversy. Concerns about potential weaponization have led to sanctions and diplomatic efforts aimed at limiting its activities. These concerns are rooted in historical evidence suggesting that Iran pursued aspects of a nuclear weapons program prior to 2003 (Arms Control Association, 2025).

The Joint Comprehensive Plan of Action (JCPOA) represented a significant attempt to address these concerns through diplomacy. The agreement imposed strict limitations on Iran’s nuclear activities, including caps on uranium enrichment and enhanced monitoring by the International Atomic Energy Agency, in exchange for sanctions relief (Britannica, 2026). Iran complied with the agreement for several years, as verified by international inspections, before tensions escalated following the withdrawal of the United States in 2018 (Arms Control Association, 2025).

Following the collapse of the JCPOA framework, Iran gradually expanded its nuclear activities, increasing uranium enrichment levels and reducing cooperation with international inspectors. These actions have brought Iran closer to the threshold of nuclear weapons capability, although it has not formally developed or tested a nuclear weapon (Arms Control Association, 2025).

The Iranian case illustrates the interplay of legal rights, security concerns, and normative perceptions. From a realist perspective, Iran’s nuclear ambitions can be understood as a rational response to regional threats and external pressure. The presence of nuclear-armed states in its broader strategic environment reinforces the logic of deterrence.

From a liberal perspective, Iran’s actions represent a challenge to international institutions and agreements designed to prevent proliferation. The erosion of the JCPOA highlights the fragility of such arrangements and the importance of sustained cooperation.

Constructivism provides additional insight by emphasizing the role of identity and perception. Iran’s nuclear program is often framed by its leaders as a symbol of sovereignty, technological advancement, and resistance to external domination. At the same time, it is perceived by other states as a potential threat, reflecting deep-seated mistrust and competing narratives.

Recent diplomatic tensions further underscore this dynamic, with Iran accusing major powers of double standards in the application of non-proliferation norms while defending the peaceful nature of its program (The Times of India). Such disputes highlight the extent to which the nuclear issue is shaped by political and normative considerations, rather than purely legal ones.

In this context, Iran’s nuclear program exemplifies the broader dilemma of sovereignty versus global security. Its actions can be interpreted simultaneously as an exercise of legal rights and as a challenge to international stability. This ambiguity underscores the limitations of the current nuclear regime.

 

Reforming the Global Nuclear Order

Addressing the challenges of nuclear governance requires both legal and normative reforms. Strengthening the NPT framework, ensuring meaningful progress toward disarmament by nuclear-weapon states, and promoting greater transparency are essential steps.

Equally important is the need to address the underlying inequalities in the system. Without greater fairness and inclusivity, the legitimacy of the non-proliferation regime will remain in question. Broader reforms of global governance structures, including those within the United Nations, may be necessary to achieve this goal.

 

Conclusion

This article has examined whether states have a legal right to develop nuclear weapons through a multidisciplinary lens. It finds that no absolute legal right exists; rather, the issue is shaped by a complex interplay of legal provisions, power dynamics, and normative frameworks. The resulting ambiguity allows for divergent interpretations, contributing to inequality and contestation within the global nuclear order.

The case of Iran highlights the limitations of existing frameworks and the need for more consistent and equitable approaches. Reconciling sovereignty with global security will require not only legal clarity but also a transformation of the norms and institutions that govern nuclear weapons.

 

References

Arms Control Association. (2025). Arms control and proliferation profile: Iran.

Britannica. (2026). Joint Comprehensive Plan of Action (JCPOA).

Finnemore, M., & Sikkink, K. (1998). International norm dynamics and political change. International Organization, 52(4), 887–917.

Juneau, T., & Razavi, S. (2018). Costly gains: A cost–benefit assessment of Iran’s nuclear program. The Nonproliferation Review, 25(1–2), 1–18.

Krasner, S. D. (1999). Sovereignty: Organized hypocrisy. Princeton University Press.

Mearsheimer, J. J. (2001). The tragedy of great power politics. W. W. Norton.

Sagan, S. D., & Waltz, K. N. (2013). The spread of nuclear weapons: An enduring debate. W. W. Norton.

Treaty on the Non-Proliferation of Nuclear Weapons. (1968).

Wendt, A. (1999). Social theory of international politics. Cambridge University Press.

International Court of Justice. (1996). Legality of the threat or use of nuclear weapons.

United Nations. (1945). Charter of the United Nations.