Abstract

This article formulates a novel conception of constitutions based on John Finnis’s jurisprudential work. The ‘central case constitution’ transcends the formal or functionalist analyses currently dominant in constitutional theory by considering a constitution as having a ‘double life’. Constitutions are necessarily and intrinsically normative and factual. The article explores Finnis’s natural law philosophy, emphasizing the central case constitution’s alignment with the practical reasonableness viewpoint and its role in directing a political community towards its common good. Focusing on key elements such as the rule of law and the context of a political community, the central case constitution emerges as a legal determination that structures society, frames political institutions and authoritatively directs communities towards justice. This ontological understanding has theoretical and practical implications, including identifying genuine constitutional purposes, safeguarding private associations from the overwhelming state presence, promoting community identity and accommodating diverse constitutional choices for self-determination.