International Relations
International relations studies politics among states and other actors in the international system — war and peace, diplomacy, trade, international institutions, and the structures and ideas that shape global order under conditions of anarchy.
Scope
The field includes IR theory, security and strategic studies, international political economy, foreign policy analysis, international organizations and law, diplomacy, peace and conflict studies, and global governance, conventionally organized as a major subfield of political science.
Sub-topics
Core questions
- Why do states go to war, and how is peace maintained?
- How is order possible in an anarchic international system?
- How do power, institutions, and ideas shape state behaviour?
- How are the global economy and politics interrelated?
- How do states make foreign policy?
Key concepts
- Anarchy
- Balance of power
- Security dilemma
- Sovereignty
- Complex interdependence
- International institutions
- Hegemony
- Constructed identities and norms
Key theories
- Classical realism
- Carr's critique of utopian liberalism and Morgenthau's account of politics as a struggle for power founded realism, grounding state behaviour in interests and the balance of power.
- The English School
- Bull argued that states form an 'anarchical society' bound by shared institutions and norms, occupying a middle ground between realism and idealism.
- Liberal institutionalism and interdependence
- Keohane and Nye showed that complex interdependence and international institutions can foster cooperation despite anarchy.
- Neorealism and constructivism
- Waltz's structural realism explained outcomes by the anarchic distribution of power; Wendt's constructivism countered that 'anarchy is what states make of it', stressing socially constructed identities and interests.
History
IR emerged after World War I, initially with a liberal-idealist hope of preventing war, challenged by Carr's and Morgenthau's realism around World War II. The behavioural and 'great debates' of mid-century, neorealism (Waltz) and neoliberal institutionalism (Keohane) in the 1970s-1980s, and the constructivist turn (Wendt) in the 1990s structure the contemporary, theoretically pluralist discipline.
Debates
- Realism versus liberalism
- Whether international politics is fundamentally a competitive struggle for power or admits durable cooperation through institutions and interdependence remains the field's central axis.
- Material structure versus ideas
- Neorealists explain behaviour by material power distributions; constructivists argue identities, norms, and shared meanings constitute interests.
Key figures
- E. H. Carr
- Hans Morgenthau
- Hedley Bull
- Robert Keohane
- Joseph Nye
- Kenneth Waltz
- Alexander Wendt
Related topics
Seminal works
- carr-1939
- morgenthau-1948
- keohane-nye-1977
- waltz-1979
- wendt-1992
Frequently asked questions
- Is international relations part of political science?
- It is conventionally a major subfield of political science, though in many universities it is organized as a discipline or department in its own right.
- What does 'anarchy' mean in IR?
- Not chaos, but the absence of a world government above states — there is no central authority to enforce rules, which shapes how states pursue security and cooperation.