Chess pieces as nation-state flags influenced by a dominating hand.

The State vs. Global Power: How Realism Shapes Our World

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Avery Sinclair in Global Affairs November 2026 • 4 min read.

"Unpacking Classical and Modern Theories"


In today's rapidly changing world, understanding the core principles that guide international relations is more critical than ever. Political realism, a long-standing theory, offers a framework for analyzing the interactions between nations, emphasizing the role of power and the pursuit of national interests. But how has this theory evolved, and what are its key concepts?

Political realism suggests that in an international arena lacking a central authority, each state acts to ensure its own survival and security. This perspective, championed by thinkers like Colin Gray, posits that enduring truths about power and national interests remain relevant despite changing global trends. Realism encourages us to look beyond temporary trends and focus on fundamental drivers.

This exploration delves into the heart of political realism, examining its development and how it interprets the relationship between power and the nation-state. By understanding these concepts, we can better grasp the underlying dynamics shaping global events and the ongoing debates in international relations.

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Measuring Realist Influence

The impact of realism is difficult to reduce to a single statistic because it is primarily a framework for interpreting international politics. It generally directs attention to states, national interests, power, and competition rather than to numerical indicators alone. Its influence is therefore best assessed through the policies and strategic choices of states, while recognizing that such interpretations remain contested.

A Power-Centered Method

A standard realist approach examines how states pursue security, national interest, and power in an international system without a central authority. This method can clarify strategic competition and the limits imposed by the international environment. Its limitation is that it may understate cooperation, institutions, ideas, and other factors that shape global affairs.

The Foundations of Realism

Political realism presents international politics as competitive and conflictual, contrasting with idealism or liberalism, which emphasizes cooperation. Realist theory views world politics as an enduring competition among self-interested states operating in an anarchic system without centralized authority. Britannica identifies E.H. Carr and Hans Morgenthau as founders of modern realism and reports that it dominated academic international-relations study in the second half of the 20th century.

What Is Realism?

Chess pieces as nation-state flags influenced by a dominating hand.

Realism emphasizes the central role of power. The term refers to a political philosophy that views the world as it is rather than how it should be, focusing on practical considerations like power and national interest over ideological or moral goals. This tradition contrasts with other schools of thought, such as idealism, which prioritize cooperation and ethical principles.

Understanding the core of realism means recognizing its key elements:

  • State as Primary Actor: Realism considers the state as the main player in international relations. Other entities, such as individuals or international organizations, are secondary.
  • Anarchy in the International System: The absence of a global authority means each state must ensure its survival.
  • Rationality: Realists assume states act rationally to maximize their security and power.
  • Power: States seek to increase their power to protect their interests and ensure survival.
  • National Interest: Policymakers prioritize their nation's interests above all else.
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Realism in a Changing World

Recent research argues that technological advances have already reshaped geopolitical dynamics in multifaceted ways. The Frontiers article on "Symbiotic Realism" presents these transformations as challenges to the core assumptions of mainstream international-relations theories. A 2025 review of realism describes the perspective as criticized for being cynical or amoral, while realists present it instead as prudence shaped by constraints from human nature and the international system.

Where Realism Falls Short

Realism can offer a useful account of power competition, but it does not necessarily explain every form of international cooperation or political change. Critics may regard its emphasis on self-interest and conflict as too narrow when institutions, shared norms, or economic ties influence state behavior. These limitations suggest that realism is better treated as one interpretive lens than as a complete explanation of global affairs.

Three Lenses on World Politics

Realism, liberalism, and constructivism are presented as three foundational theories of international relations. They differ in their assumptions about state behavior, global governance, and international cooperation, and each offers distinct strengths, weaknesses, and real-world applications. Broader surveys also place feminism, Marxism, and postcolonialism among approaches that help explain global governance.

Different types of realism have emerged over time, each providing a unique view on these core elements. The classic realism of thinkers like Hans Morgenthau emphasizes the inherent human desire for power. Structural realism, developed by Kenneth Waltz, focuses more on the structure of the international system and the distribution of power as key influences on state behavior. Neoclassical realism attempts to bridge these perspectives.

Realism Today

In conclusion, understanding political realism provides crucial insights into the dynamics of international relations. As global challenges continue to evolve, realism remains a valuable tool for policymakers and observers alike in navigating the complexities of our interconnected world. From great power competition to the resurgence of nationalism, realism offers a framework for making sense of an often-unpredictable global landscape.

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Power and Its Continuing Relevance

Commentary on realism emphasizes both its limitations and its continuing relevance. Complex interdependence presents a challenge to realism's focus on power, yet that focus endures as a way to interpret competition in international politics. Realism's central concern with the competitive and conflictual side of world affairs remains an important part of debates about global order.

Realism's Continuing Future

A 2025 overview argues that realism continues to dominate the study of international relations. Its future relevance will depend on how well its assumptions explain changing forms of power and competition. The framework remains a starting point for examining why states prioritize security, national interest, and strategic positioning.

A Contested International System

Realism places global affairs within an international system where no single central authority reliably governs all states. This perspective highlights the systemic pressures created by insecurity, competition, and unequal power. At the same time, broader analysis should account for cooperation and other forces that realism may not fully capture.

Realism in Practice

Realism has had a profound impact on the practice of international relations and continues to inform the policies and strategies of states. Contemporary applications include analysis of great-power rivalry and regional conflicts. One recent discussion applies the framework to the US-China rivalry, the conflict in Ukraine, and the role of regional powers and external actors in shaping global politics.

What realism's evidence can and cannot show

Classical realism starts its explanation of politics with human nature. The quoted excerpt about an anarchic world is incomplete, so it does not establish a fuller claim about what anarchy means.[1]

A dataset focused on central wars cannot be read as a measure of overall violence. Its authors also say its results do not support institutional, cultural, and discursive theories, including constructivism and liberalism; that conclusion is bounded by the dataset’s stated scope.[2]

Realist alternatives to liberal hegemony are not presented as a complete solution: the cited analysis says restraint and offshore balancing could generate proxy wars without supplying enough institutions, practices, or norms to manage them.[3]

Why realist claims resist simple measurement

Realist theories have followed several paths, and scholars report growing difficulty defining a single realistic approach. This makes the tradition itself harder to describe with one settled definition.[4]

Debates over balance of power involve both ambiguity in the concept and difficulty specifying how such a system operates. Attempts to quantify power, status, alignments, and cooperation-conflict ratios also face formidable obstacles.[5]

Questions realism leaves unresolved

  • How should analysts distinguish among the different paths of realist theory when the approach itself is difficult to define?[4]
  • What reliable measures could capture power and status, or compare alignments and cooperation with conflict, given the obstacles identified in the sources?[5]

Sources

  1. Political Realism in International Relations (Stanford Encyclopedia of Philosophy) (plato.stanford.edu)
  2. Great Power Politics in World History: Balance of Power and Central Wars Since Antiquity (doi.org)
  3. The limits of realism after liberal hegemony (eprints.lse.ac.uk)
  4. POLITICAL REALISM IN INTERNATIONAL RELATIONS: CONCEPTION AND MISCONCEPTIONS AFTER THE COLD WAR | Politologija (www.journals.vu.lt)
  5. The nineteenth century system: balance of power or political equilibrium? | Review of International Studies | Cambridge Core Logo for Cambridge Core from Cambridge University Press. Click to return to (www.cambridge.org)

About this Article -

Written with AI assistance from published research, and reviewed by the Mystum team. See our About page for more information.

Everything You Need To Know

1

What are the core tenets of political realism, and how does it differ from other schools of thought like idealism?

Political realism is a school of thought that views the world as it is, rather than how it should be. It emphasizes practical considerations such as power and national interest, prioritizing these over ideological or moral goals. Key tenets of realism include the state as the primary actor, the anarchic nature of the international system, rationality in state actions, the pursuit of power, and the prioritization of national interest. It contrasts with idealism, which values cooperation and ethical principles.

2

How do classical realism, structural realism, and neoclassical realism differ in their explanations of state behavior?

Classical realism, exemplified by thinkers like Hans Morgenthau, emphasizes the inherent human desire for power as a driving force in international relations. Structural realism, associated with Kenneth Waltz, focuses on the international system's structure and the distribution of power among states as the primary influences on their behavior. Neoclassical realism seeks to integrate both perspectives, considering both systemic factors and state-level variables in explaining international relations. These offer different lenses through which to understand state behavior, one focusing on human nature, another on the international structure.

3

According to realism, how do states behave in the international system, and why is rationality a key assumption?

Realism posits that states act rationally to maximize their security and power within the anarchic international system. This means policymakers prioritize their nation's interests above all else, seeking to increase their power to protect those interests and ensure survival. Other considerations, such as morality or international cooperation, are secondary to the state's primary goal of self-preservation. Understanding this rationality is crucial for predicting and interpreting state behavior in the global arena. However, realism does not explicitly detail the cognitive or decision-making processes within states, nor does it address the potential for miscalculation or irrationality due to internal political dynamics.

4

How does realism shape our understanding of global events, such as great power competition and the resurgence of nationalism?

Realism significantly impacts our understanding of global events by providing a framework that emphasizes power dynamics and national interests. It suggests that states will primarily act to ensure their survival and increase their influence, leading to competition and conflict. This perspective helps explain phenomena such as great power competition and the resurgence of nationalism. However, realism may not fully account for the role of non-state actors, such as multinational corporations or international organizations, in shaping global events.

5

What are some of the limitations of realism as a framework for understanding international relations, and what aspects of global politics does it potentially overlook?

While realism provides a valuable framework for understanding international relations, it has several limitations. It tends to downplay the role of morality, ethics, and international law in shaping state behavior, focusing primarily on power and self-interest. Additionally, realism may struggle to explain instances of international cooperation and the emergence of global norms. Moreover, some critics argue that realism's emphasis on the state as the primary actor neglects the influence of non-state actors and transnational forces in contemporary global politics. To complement the theory we need to look at the impacts of constructivism and liberalism.

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