Regional systems analysis has evolved significantly since the end of the Cold War, particularly with the rise of regional blocs and multilateral groupings. This shift has helped shape a wide range of theoretical frameworks addressing conflict, security, cooperation, integration, and their interconnected dynamics at the regional level. Scholars in both international relations and regional studies have worked to develop conceptual models capable of explaining the complexity of regional interactions in today’s global order.

What Is Theory?

Theory is a foundational element in guiding, structuring, and refining scientific knowledge. It contributes to intellectual progress and cumulative learning. However, scholars differ in defining the concept.

In Theory of International Politics, Kenneth Waltz offers two definitions. First, he describes theory as a set of laws related to the behavior of a particular phenomenon. Second, he clarifies that theories are not the laws themselves but attempts to explain those laws. Laws identify relationships; theories explain why those relationships exist.

Chris Brown defines theory as “reflective thought,” while Brian White describes it as a set of hypotheses organized into a deductive system, where later assumptions build upon earlier ones. Michael Doyle emphasizes empirical testing, defining theory as the use of data to test hypotheses about the world—such as examining the absence of war among liberal democracies.

Meanwhile, James Dougherty and Robert Pfaltzgraff highlight normative theory as a framework of values, behavioral rules, and principles that define how political actors ought to behave, including ethical approaches to international relations.

Operationally, theory can be understood as a knowledge-building tool—a structured combination of core and secondary assumptions that provides explanation and interpretation of a given phenomenon.

Classification of Theory

Stanley Hoffmann proposed a three-part classification of theories:

1. Philosophical vs. Empirical Theory

Philosophical theory begins with assumptions about human nature and evaluates political phenomena based on moral values. Empirical theory, by contrast, focuses on studying specific cases without necessarily drawing universal judgments.

2. General vs. Middle-Range Theory

General theory explains international phenomena through a central concept, such as power. Middle-range theory examines specific aspects of international relations, such as decision-making processes.

3. Deductive vs. Inductive Theory

Deductive theory starts from broad assumptions to identify patterns and rules. Inductive theory begins with specific cases and derives broader generalizations.

Functions of Theory

A theory must perform three core functions: description, explanation, and prediction.

Description

Description identifies and defines the phenomenon under study. It answers the question: What are we examining? By clarifying characteristics and concepts, it provides a structured understanding of the subject.

Explanation

Explanation analyzes spatial and temporal dimensions, identifying internal and external factors that shape the phenomenon. It answers the question: Why does this occur?

Prediction

Prediction attempts to anticipate future developments and guide outcomes toward desired objectives. However, due to the complexity and volatility of international politics, predictive capacity remains limited.

Theoretical Interpretations of Regional Phenomena

Several major frameworks explain regional dynamics in international relations.

1. Realism

Realists study international politics as it actually exists. Unlike idealists who emphasize harmony of interests, realists argue that conflict is inherent due to competing national interests.

According to Realism, regional cooperation is a strategic tool used by states to pursue political, economic, or geostrategic interests. States seek survival in an anarchic international system defined by competition and power struggles.

For Kenneth Waltz, alliances and regional groupings form primarily in response to external security threats. Neorealists focus on relative power gains and often view interdependence skeptically, arguing that closer ties may increase vulnerability.

2. Liberalism

Liberalism—particularly liberal institutionalism—has become central to understanding regionalism.

Its core assumptions include:

• States act rationally to maximize gains.
• Interests are socially constructed and evolve.
• Interdependence fosters cooperation.

Liberal institutionalists argue that regional institutions reduce uncertainty, lower transaction costs, provide information, and facilitate collective problem-solving. Organizations such as the European Union illustrate how institutional frameworks enhance stability, welfare, and shared progress.

3. Functionalism and Neofunctionalism

Functionalism emerged from early 20th-century cooperation experiences, particularly among Allied powers.

Classical Functionalism

David Mitrany argued that integration should begin in technical and economic sectors rather than political ones. His “spillover” principle—later expanded by neofunctionalists—suggests that cooperation in one area generates demand for cooperation in others.

Neofunctionalism

Ernst Haas advanced this theory, arguing that states gradually transfer authority to regional institutions. The European Union exemplifies this process, evolving from economic coordination to deeper political integration, including monetary union and common policy frameworks.

4. Dependency Theory

Dependency Theory, associated with neo-Marxist thought, emerged in Latin America in the 1960s. It analyzes global inequalities between “core” and “periphery” states within the capitalist system.

Thinkers such as Samir Amin argued that unequal exchange sustains underdevelopment in peripheral states. Johan Galtung examined structural inequalities between Europe and the Global South, highlighting systemic imbalances in economic and political power.

5. Regional Security Complex Theory

Developed by the Copenhagen School, particularly Barry Buzan in People, States and Fear, this theory expands security analysis beyond the national level.

A regional security complex consists of states whose security concerns are so interlinked that their national securities cannot be analyzed independently.

Key variables include:

• Patterns of amity and enmity
• Geographic proximity
• Security interdependence
• Regional balance of power

Buzan identifies different types of security complexes, including centered systems (such as North America and the European Union), great-power complexes (e.g., East Asia), and standard complexes (such as the Middle East and South Asia).

6. Critical Theory

Critical Theory challenges the separation between theory and practice. Influenced by thinkers like Max Horkheimer, Theodor Adorno, and Jürgen Habermas, it critiques the state as an exclusionary political form.

Critical theory seeks global emancipation, equality, and freedom. It advocates restructuring the modern state system toward more universal and inclusive forms of governance, questioning entrenched hierarchies and systemic inequalities in global power relations.

7. Constructivism

Constructivism gained prominence after the Cold War. Key figures include Alexander Wendt, Friedrich Kratochwil, and Emanuel Adler.

Constructivism argues that regions are social constructions shaped by shared identities, norms, and discourse—not merely geographic realities. Interests and identities evolve through interaction, socialization, and shared meanings.

Norm entrepreneurs, as discussed by Martha Finnemore and Kathryn Sikkink, play a key role in shaping regional agendas and institutional development.

Conclusion

Each theoretical framework offers distinct assumptions and analytical tools for understanding regional dynamics. Realism highlights power and survival; liberalism emphasizes institutions and interdependence; functionalism explains gradual integration; dependency theory exposes structural inequality; security complex theory examines regional threat patterns; critical theory questions systemic hierarchies; and constructivism foregrounds identity and norms.

To achieve a comprehensive understanding of regional interactions, scholars must integrate insights from multiple approaches. No single theory fully captures the complexity of regional politics in today’s interconnected world.

Sources

• Waltz, Kenneth. Theory of International Politics. 1979.
• Keohane, Robert. After Hegemony. 1984.
• Haas, Ernst. The Uniting of Europe. 1958.
• Mitrany, David. A Working Peace System. 1943.
• Buzan, Barry. People, States and Fear. 1991.
• Buzan, Barry & Wæver, Ole. Regions and Powers. 2003.
• Wendt, Alexander. Social Theory of International Politics. 1999.
• Amin, Samir. Unequal Development. 1976.
• Cox, Robert W. “Social Forces, States and World Orders.” 1981.