Liberalism

What states want is shaped by their societies, their trade and their laws, and cooperation can endure.

Liberalism denies that anarchy dictates a single logic. It looks inside the state and at the ties between societies, and finds that preferences are not fixed by the system: who holds power domestically, how a government is held to account, what its citizens trade and with whom, and which laws it has bound itself to all shape what it seeks abroad.

Immanuel Kant's Perpetual Peace set out the argument that republics, commerce and a federation of free states could make peace something more than a pause between wars. The modern democratic peace research programme, associated with Michael Doyle among others, takes up the empirical claim that liberal democracies have very rarely fought one another. Robert Keohane and Joseph Nye described complex interdependence, in which multiple channels connect societies, force is a costly and often unusable instrument, and there is no clear hierarchy of issues.

Liberalism therefore expects international law, trade and institutions to change behaviour rather than merely record it, and it takes the growth of that machinery seriously as a fact about world politics. Its critics reply that these arrangements track power more closely than liberals allow, and hold up while they suit the strong.

Key thinkers

Immanuel Kant, Woodrow Wilson, Michael Doyle, Robert Keohane, Joseph Nye, Andrew Moravcsik.

Core concepts

democratic peace, complex interdependence, collective security, international law, commercial peace, domestic preferences.

Liberalism applied to 45 historical events

Every event on Theoria is read through all six theories. These are the readings Liberalism gives, moment by moment. Open one to compare it against the other five, or explore them on the interactive map.

The other theories