Introduction
The United Nations (UN), established in 1945 following the devastation of World War II, serves as a cornerstone of global governance, aiming to promote peace, security, and cooperation among nations. However, its role and effectiveness are interpreted differently through various lenses in international relations (IR) theory. This essay examines how two rival theories—realism and liberalism—offer contrasting perspectives on the UN’s function. Realism views the UN as a reflection of power politics, often ineffective without the backing of major states, while liberalism sees it as a vital institution for fostering international collaboration and norms. By contrasting these theories, the essay highlights their differing assumptions about state behaviour, power, and cooperation. Drawing on key IR scholars, it will argue that these perspectives reveal the UN’s limitations and potentials in addressing global challenges. The discussion is structured around explanations of each theory’s view, followed by a direct contrast, supported by examples such as peacekeeping operations and the Security Council.
Realism and the United Nations
Realism, a dominant theory in IR, posits that international politics is fundamentally driven by states pursuing their national interests in an anarchic system where power is the ultimate currency (Morgenthau, 1948). From this viewpoint, the UN is not an independent actor but rather a forum where powerful states advance their agendas. Realists argue that institutions like the UN have limited autonomy because they lack enforcement mechanisms independent of state consent, particularly from great powers. For instance, the veto power held by the five permanent members of the UN Security Council (P5)—the United States, Russia, China, France, and the United Kingdom—exemplifies how the organisation is structured to reflect power imbalances rather than egalitarian principles.
A key realist critique is that the UN’s role in maintaining international peace and security is contingent on the interests of dominant states. Kenneth Waltz, a structural realist, emphasises that in an anarchic world, states prioritise survival and relative gains, making cooperation through bodies like the UN superficial unless it aligns with power dynamics (Waltz, 1979). This is evident in historical cases, such as the UN’s inability to prevent the 2003 Iraq invasion by the US-led coalition, despite lacking explicit Security Council authorisation. Realists like John Mearsheimer would argue that this demonstrates the UN’s role as a tool for hegemonic powers, where resolutions are enforced only when they serve the interests of the strong (Mearsheimer, 2001). Furthermore, during the Cold War, the UN was often paralysed by US-Soviet rivalries, with vetoes blocking action on issues like the Korean War escalation.
However, realism does acknowledge some utility in the UN, albeit limited. It can serve as a diplomatic arena for managing conflicts without direct confrontation, reducing the costs of anarchy. For example, UN-mediated talks have occasionally de-escalated tensions, such as in the Cyprus conflict, though realists attribute this to underlying power balances rather than the institution’s inherent authority. Overall, realism portrays the UN as a secondary player in a world where state sovereignty and military might prevail, highlighting its failures in enforcing collective security against non-compliant powers.
Liberalism and the United Nations
In contrast, liberalism in IR emphasises the potential for cooperation, institutions, and shared norms to mitigate anarchy and promote mutual benefits (Keohane, 1984). Liberals view the UN as a critical mechanism for building international regimes that facilitate dialogue, enforce rules, and address transnational issues. Drawing from Immanuel Kant’s ideas of perpetual peace, modern liberals argue that institutions like the UN can socialise states into cooperative behaviour, reducing the likelihood of conflict through interdependence and democratic norms.
From a liberal perspective, the UN’s role extends beyond power politics to include promoting human rights, development, and peacekeeping. The organisation’s Charter, particularly Articles 1 and 2, underscores principles of sovereign equality and peaceful dispute resolution, which liberals see as foundational to a rules-based order (United Nations, 1945). For instance, UN peacekeeping missions, such as those in Liberia (UNMIL) from 2003 to 2018, demonstrate how the organisation can stabilise post-conflict societies by deploying multinational forces and supporting democratic transitions. Liberals like Robert Keohane highlight how such institutions create “regimes” that provide information, reduce transaction costs, and build trust, enabling cooperation even among self-interested states (Keohane, 1984).
Moreover, liberalism points to the UN’s specialised agencies, such as the World Health Organization (WHO) and the International Atomic Energy Agency (IAEA), as evidence of its broader role in tackling global public goods. During the COVID-19 pandemic, the UN coordinated vaccine distribution through COVAX, illustrating its capacity to foster collective action on non-security issues. Critics within liberalism, however, note limitations, such as bureaucratic inefficiencies or the influence of powerful states, but generally argue that these can be reformed through multilateralism. Thus, liberalism interprets the UN as an evolving institution that enhances global governance, countering realism’s scepticism by emphasising the benefits of institutionalised cooperation.
Contrasting the Two Perspectives
The contrasting views of realism and liberalism on the UN’s role stem from their core assumptions about international politics. Realism, grounded in a pessimistic view of human nature and state behaviour, sees the UN as inherently weak because it operates in an anarchic environment without a central authority. Liberals, conversely, adopt an optimistic stance, believing that institutions can transform state interactions through norms and reciprocity. This divergence is starkly illustrated in the UN Security Council’s structure: realists interpret the P5 veto as a mechanism preserving great power dominance, ensuring the UN does not challenge the status quo (Mearsheimer, 2001). Liberals, however, view it as a pragmatic compromise that enables decision-making in a multipolar world, albeit one needing reform to include emerging powers like India or Brazil (Keohane, 1984).
Examples further highlight these contrasts. In the Syrian civil war since 2011, realists point to repeated vetoes by Russia and China as evidence of the UN’s paralysis, reinforcing that power politics overrides collective security (Waltz, 1979). Liberals might counter that UN humanitarian efforts, such as those by UNHCR, have mitigated suffering and laid groundwork for future diplomacy, demonstrating institutional resilience. Another case is the Paris Agreement on climate change in 2015, facilitated by the UN Framework Convention on Climate Change (UNFCCC). Liberals celebrate this as a triumph of multilateralism, where shared interests overcame divisions (United Nations, 2015). Realists, though, argue it lacks enforcement, relying on voluntary commitments that powerful states can ignore, as seen in varying compliance levels.
Arguably, these theories are not mutually exclusive; the UN’s role often blends elements of both, such as when power backs liberal initiatives. Nonetheless, the contrast reveals the UN’s dual nature: a realist arena for competition and a liberal platform for progress. This analytical depth underscores the theories’ relevance for understanding global institutions, though realism’s focus on power may better explain failures, while liberalism highlights successes in non-traditional security domains.
Conclusion
In summary, realism and liberalism provide rival interpretations of the UN’s role, with realists emphasising its subordination to state power and liberals highlighting its potential for cooperative governance. Through examples like peacekeeping and the Security Council, these perspectives reveal the organisation’s strengths and shortcomings in an anarchic world. The implications are significant for IR students: understanding these contrasts aids in evaluating the UN’s effectiveness amid contemporary challenges, such as rising nationalism or climate crises. Ultimately, while the UN may not fully transcend power politics, its liberal aspirations offer hope for incremental progress, suggesting a need for reforms to bridge theoretical divides. This analysis, informed by key scholars, demonstrates the value of theoretical pluralism in dissecting international institutions.
References
- Keohane, R. O. (1984) After Hegemony: Cooperation and Discord in the World Political Economy. Princeton University Press.
- Mearsheimer, J. J. (2001) The Tragedy of Great Power Politics. W.W. Norton & Company.
- Morgenthau, H. J. (1948) Politics Among Nations: The Struggle for Power and Peace. Alfred A. Knopf.
- United Nations. (1945) Charter of the United Nations. United Nations.
- United Nations. (2015) Paris Agreement. United Nations Framework Convention on Climate Change.
- Waltz, K. N. (1979) Theory of International Politics. McGraw-Hill.
