International Relations Cheat Sheet

The core ideas of International Relations distilled into a single, scannable reference — perfect for review or quick lookup.

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Quick Reference

Realism

A major IR theory holding that the international system is anarchic, states are the primary actors, and the pursuit of power and national interest drives state behavior. Realists view conflict as an inherent feature of international politics and emphasize military capability and balance of power.

Liberalism

An IR theory arguing that international institutions, economic interdependence, and democratic governance can mitigate conflict and promote cooperation among states. Liberals believe that free trade, international law, and multilateral organizations create mutual benefits that reduce the likelihood of war.

Constructivism

A theoretical approach asserting that the international system is shaped by shared ideas, norms, identities, and social interactions rather than solely by material factors like military power. Constructivists argue that state interests are not fixed but are constructed through social processes.

Balance of Power

A concept describing the distribution of power among states in the international system, where no single state is dominant. States form alliances and build military capacity to prevent any one state from achieving hegemony, thereby maintaining systemic stability.

Sovereignty

The principle that each state has supreme authority within its territorial boundaries and is legally equal to other states in the international system. Sovereignty underpins the modern state system established by the Peace of Westphalia in 1648 and remains a foundational concept in international law.

Soft Power

A concept coined by Joseph Nye describing the ability of a state to influence others through attraction and persuasion rather than coercion or payment. Soft power arises from a country's culture, political values, and foreign policies when they are seen as legitimate and morally authoritative.

Deterrence

A strategy aimed at preventing an adversary from taking an undesired action by threatening severe consequences, most commonly associated with nuclear weapons policy. Effective deterrence requires credible threats and the demonstrated willingness to follow through on them.

Collective Security

An arrangement in which a group of states agrees that an attack on one is an attack on all, committing to respond collectively to aggression. This concept underpins organizations like NATO and the United Nations Security Council's mandate to maintain international peace and security.

Globalization

The process of increasing interconnectedness among states and societies through the flow of goods, capital, information, people, and ideas across borders. Globalization has created both opportunities for cooperation and new vulnerabilities, as economic crises, pandemics, and environmental problems spread rapidly across national boundaries.

Security Dilemma

A situation in which actions taken by a state to increase its own security, such as building up military forces, cause other states to feel less secure and respond with their own military buildup. This dynamic can lead to arms races and escalation even when no state intends aggression.

Key Terms at a Glance

Anarchy:The absence of a central governing authority above sovereign states in the international system, requiring states to rely on self-help for survival and security.

Balance of Power:A condition in which power is distributed among states so that no single state can dominate, maintained through alliances, military buildups, and diplomacy.

Bipolarity:An international system structure in which two superpowers dominate global politics, as exemplified by the United States and the Soviet Union during the Cold War.

Collective Security:An arrangement in which states agree to respond collectively to aggression against any member, treating an attack on one as an attack on all.

Constructivism:An IR theory arguing that international politics is shaped by shared ideas, norms, identities, and social interactions rather than purely material factors.

Deterrence:A strategy of preventing adversary action by threatening severe retaliatory consequences, most commonly associated with nuclear weapons policy.

Diplomacy:The practice of conducting negotiations and managing relationships between states and other international actors through dialogue, negotiation, and compromise.

Failed State:A state that can no longer perform its basic functions of governance, security, and service delivery, often characterized by internal conflict, corruption, and loss of territorial control.

Foreign Policy:The set of strategies and actions a state pursues in its interactions with other states and international actors, shaped by national interests, domestic politics, and external pressures.

Globalization:The increasing interconnectedness of economies, societies, and political systems through cross-border flows of goods, capital, information, and people.

Hegemony:The dominance of one state over others in the international system, often exercised through a combination of military, economic, and cultural power.

Humanitarian Intervention:The use of military force by one or more states in another state's territory to prevent or stop widespread human rights abuses, often raising tensions between sovereignty and human rights.

Interdependence:A condition in which states and other actors are mutually dependent on each other, such that actions by one actor significantly affect others, often through economic and trade relationships.

International Law:The body of rules, norms, and treaties that govern the conduct of states and other actors in the international system, including areas such as human rights, trade, and the laws of war.

Liberalism:An IR theory emphasizing the potential for cooperation through international institutions, economic interdependence, and democratic governance to promote peace and prosperity.

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