Deep Dive into Realism Theory in International Relations

Realism theory is one of the foundational theories in the field of international relations (IR). Developed in the early 20th century, realism provides a framework for understanding the dynamics of international politics. It focuses on power, national interests, and the pursuit of security in a world characterized by anarchy. In this article, we will take a deep dive into realism theory, exploring its key assumptions, core concepts, historical context, and its implications for understanding global politics.

  1. Historical Context and Development of Realism:

Realism emerged as a response to the devastating consequences of World War I and the disillusionment with idealistic visions of global harmony. Influenced by thinkers such as Thucydides, Machiavelli, and Hobbes, realism gained prominence as a way to explain the behavior of states in the international system. Key figures in the development of realism include Hans Morgenthau, E.H. Carr, and Kenneth Waltz, each contributing unique perspectives and insights to the theory.

  1. Core Assumptions of Realism:

Realism is based on several core assumptions about the nature of international politics:

a. Anarchy: Realists view the international system as anarchic, meaning there is no central authority that governs interactions between states. In the absence of a global government, states operate in a self-help system where they prioritize their own interests and survival.

b. State Centrality: Realism emphasizes the centrality of the state as the primary actor in international relations. States are viewed as rational entities that pursue their interests in a competitive environment.

c. Primacy of Power: Power is a central concept in realism. Realists argue that power is the currency of international politics, encompassing both military capabilities and economic resources. The distribution and balance of power among states shape their behavior and interactions.

d. National Interest: Realists contend that states act in accordance with their national interests, which are defined primarily in terms of security and survival. States prioritize their own interests over collective or moral considerations.

  1. Key Concepts in Realism:

a. Balance of Power: Realists emphasize the importance of balancing power to maintain stability in the international system. The balance of power theory suggests that states will seek to prevent the emergence of a dominant power that could threaten their security.

b. Security Dilemma: The security dilemma refers to the paradoxical situation in which a state’s efforts to enhance its security can unintentionally provoke fear and insecurity in other states. This dynamic can lead to arms races, mistrust, and conflict.

c. Self-Help and Survival: Realism posits that states rely on self-help strategies to ensure their survival. This includes the pursuit of military capabilities, alliances, and strategic calculations to protect their interests and deter potential threats.

d. Rationality and Calculated Behavior: Realism assumes that states are rational actors that carefully calculate costs and benefits in their decision-making. Rationality is guided by the pursuit of self-interest and the maximization of relative gains.

  1. Realist Perspectives and Variations:

Realism encompasses different perspectives and variations that emphasize specific aspects of the theory:

a. Classical Realism: Classical realism, influenced by thinkers like Thucydides and Machiavelli, focuses on the inherent flaws and limitations of human nature as the driving force behind state behavior. It emphasizes the role of individual leaders and their quest for power and security.

b. Neorealism (Structural Realism): Neorealism, pioneered by Kenneth Waltz, shifts the focus from individual leaders to the structure of the international system. It emphasizes the distribution of power among states and how it affects their behavior. Neorealism argues that the structure of the system, rather than individual characteristics, determines state behavior.

c. Defensive Realism: Defensive realism emphasizes states’ primary concern for survival and security. It argues that states seek to maintain a balance of power and focus on defensive strategies to protect their interests and deter potential threats.

d. Offensive Realism: Offensive realism, proposed by John Mearsheimer, posits that states are primarily driven by the desire for power and hegemony. It argues that states will seek to maximize their power and influence in a competitive international system.

  1. Criticisms of Realism:

Realism has faced several criticisms over the years. Some of the main criticisms include:

a. Oversimplification: Critics argue that realism oversimplifies complex international relations by reducing them to power struggles and neglecting other factors such as ideology, culture, and non-state actors.

b. Neglect of Cooperation and Diplomacy: Realism’s focus on power and self-interest downplays the potential for cooperation, diplomacy, and the role of international institutions in shaping global politics.

c. Limited Policy Prescriptions: Realism’s emphasis on the primacy of power and national interest can limit its ability to offer effective policy prescriptions for complex global challenges such as climate change, economic interdependence, and transnational threats.

d. Neglect of Domestic Factors: Realism tends to overlook the role of domestic politics, public opinion, and societal factors in shaping state behavior and foreign policy decisions.


Realism theory has played a significant role in shaping the study of international relations. Its emphasis on power, self-interest, and the anarchic nature of the international system provides valuable insights into state behavior and the dynamics of global politics. Understanding realism helps to explain issues such as balance of power, security dilemmas, and the pursuit of national interests. However, it is crucial to recognize the limitations of realism and to supplement its insights with other theories and perspectives to develop a comprehensive understanding of the complexities of international relations. By critically examining realism and its assumptions, scholars and policymakers can engage in informed debates and develop nuanced approaches to address the challenges of a rapidly changing world.

SAKHRI Mohamed
SAKHRI Mohamed

I hold a bachelor's degree in political science and international relations as well as a Master's degree in international security studies, alongside a passion for web development. During my studies, I gained a strong understanding of key political concepts, theories in international relations, security and strategic studies, as well as the tools and research methods used in these fields.

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