This book investigates both the continuity and change of sovereignty through an examination of the different ways it is understood; sovereignty as an institution, as identity; as a (language) game; and as subjectivity. In this illuminating book, Aalberts examines sovereign statehood as a political-legal concept, an institutional product of modern international society, and seeks an interdisciplinary approach that combines international relations and international law. This book traces the consequences of this origin for the conceptualization of sovereign statehood in modern academic discourse, drawing on key jurisprudence and international treaties, and provides a new framework to consider the international significance of sovereignty. As an innovative approach to a critical institution, will be of interest to students and scholars of international relations, international relations theory and international law.