Popular sovereignty - the doctrine that the public powers of state originate in a concessive grant of power from 'the people' - is perhaps the cardinal doctrine of modern constitutional theory, placing full constitutional authority in the people at large, rather than in the hands of judges, kings, or a political elite. Although its classic formulation is to be found in the major theoretical treatments of the modern state, such as in the treatises of Hobbes, Locke, and Rousseau, this book explores the intellectual origins of this doctrine and investigates its chief source in late medieval and...