English School Pluralism

Pluralism is one of the two main normative positions inside the English School of International Relations, set against solidarism. Associated with Hedley Bull's The Anarchical Society (1977) and developed further by Robert Jackson in The Global Covenant (2000), pluralism argues that culturally and politically diverse states can sustain an "international society" only by agreeing on a minimal set of rules: mutual recognition of sovereignty, non-intervention, the sanctity of treaties (pacta sunt servanda), diplomacy, the limitation of war, and the balance of power.

For pluralists, these are the institutions that make orderly coexistence possible in an anarchical system. They are deliberately procedural rather than substantive. Pluralists are sceptical that states share enough moral common ground to enforce ambitious goals such as human rights protection, humanitarian intervention, or distributive justice without damaging the underlying order. On this view, pushing solidarist projects risks legitimising great-power interventionism and eroding the equal sovereignty of weaker states.

Key features of the pluralist position:

• State-centric: states, not individuals, are the primary members of international society.
• Order before justice: stable coexistence is the precondition for any thicker moral claims.
• Sovereignty as a moral value: non-intervention protects political and cultural diversity.
• Thin morality: shared norms exist but are limited to what is needed for coexistence.

Pluralism contrasts with solidarism, associated with Nicholas Wheeler's Saving Strangers (2000) and later Bull himself in places, which holds that international society can and should enforce common standards of humanity, including through humanitarian intervention. Debates between pluralists and solidarists shaped English School responses to NATO's 1999 Kosovo campaign, the 2005 Responsibility to Protect doctrine, and the 2011 Libya intervention. Pluralism remains influential among scholars wary of liberal interventionism and of conflating Western preferences with universal norms.