Introduction
This essay explores the most widely accepted definitions of international relations (IR) as articulated by prominent scholars in the field. As a discipline within history and international studies, IR examines the interactions between states, non-state actors, and global systems. The purpose of this essay is to identify and analyse the core elements of these definitions, considering their applicability and limitations in explaining global dynamics. The discussion will focus on key scholarly perspectives, particularly those of realism and liberalism, while critically assessing how these definitions shape our understanding of international phenomena. By drawing on academic sources, this essay aims to provide a sound, albeit limited, critique of these interpretations and their relevance in the contemporary world.
The Realist Perspective on International Relations
Realism, one of the foundational paradigms in IR, offers a definition rooted in the primacy of state power and national interest. Hans Morgenthau, a leading realist scholar, defines IR as the struggle for power among nations, where states operate in an anarchic international system devoid of a central authority (Morgenthau, 1948). This view suggests that international interactions are primarily driven by self-interest and the pursuit of security, often resulting in conflict. Morgenthau’s definition is significant because it prioritises tangible factors like military strength and economic resources, providing a clear framework for understanding historical events such as the Cold War, where superpower rivalry dominated global politics.
However, the realist definition has limitations. It often overlooks the role of non-state actors, such as international organisations or multinational corporations, which have grown in influence in recent decades. Furthermore, Morgenthau’s focus on conflict arguably neglects the potential for cooperation, a critique often raised by scholars from other schools of thought. Despite this, realism remains a widely accepted lens through which many academics and policymakers interpret international behaviour, particularly in times of geopolitical tension.
The Liberalist View of International Relations
In contrast, liberal scholars define IR through the lens of cooperation and interdependence. Immanuel Kant, whose ideas continue to shape liberal thought, envisioned a world where states could achieve peace through mutual cooperation and democratic governance (Kant, 1795). Modern liberal theorists, such as Robert Keohane, build on this by defining IR as a system of complex interdependence, where states and non-state actors engage through shared norms, institutions, and economic ties (Keohane, 1984). This perspective highlights the role of international law and organisations like the United Nations in fostering stability.
The liberal definition is particularly relevant in explaining phenomena such as globalisation, where economic integration has arguably reduced the likelihood of large-scale conflict between major powers. However, critics point out that liberalism can be overly optimistic, failing to account for persistent inequalities and power imbalances in international systems. Nevertheless, its emphasis on collaboration offers a valuable counterpoint to realist pessimism, enriching the scholarly discourse on IR.
Critical Reflections on Defining International Relations
While both realism and liberalism provide influential definitions of IR, neither fully encapsulates the complexity of global interactions. For instance, emerging issues like climate change and cybersecurity challenge traditional state-centric models, calling for a more inclusive definition that incorporates transnational and non-governmental dimensions. Scholars like Joseph Nye have attempted to address this by introducing concepts like ‘soft power,’ suggesting that IR involves not just coercion or cooperation but also the power of attraction and influence (Nye, 2004). This indicates a growing need to adapt definitions to contemporary realities.
Additionally, the cultural and historical contexts in which these definitions were formulated must be considered. Realist and liberal theories originated in a Western academic tradition, which may limit their applicability to non-Western perspectives. Indeed, a broader understanding of IR might integrate insights from postcolonial or feminist scholars, who critique the Eurocentric bias in traditional definitions. While this essay does not delve deeply into these alternative views due to scope constraints, their relevance underscores the dynamic nature of IR as a field of study.
Conclusion
In summary, the most acceptable scholarly definitions of international relations, as articulated by realists like Morgenthau and liberals like Keohane, centre on the themes of power and cooperation, respectively. Realism provides a pragmatic framework for understanding conflict and state behaviour, while liberalism offers an optimistic vision of interdependence and peace. However, both perspectives have limitations, particularly in addressing the multifaceted nature of modern global challenges. The evolving scope of IR suggests that no single definition can fully capture its essence, necessitating a critical and integrative approach to scholarship. Ultimately, these definitions remain foundational for students of history and international studies, guiding our comprehension of past and present global dynamics while inviting further exploration into uncharted dimensions of the field.
References
- Keohane, R. O. (1984) After Hegemony: Cooperation and Discord in the World Political Economy. Harvard University Press.
- Kant, I. (1795) Perpetual Peace: A Philosophical Sketch. Reprinted in various editions, accessible via academic libraries.
- Morgenthau, H. J. (1948) Politics Among Nations: The Struggle for Power and Peace. Alfred A. Knopf.
- Nye, J. S. (2004) Soft Power: The Means to Success in World Politics. PublicAffairs.

