The papers collected in this volume highlight the complex dynamic relationship between citizenship – as membership status – and the constitutional law which provides the cornerstone of all polities. It shows the many different ways in which we must use constitutional law in order fully to understand how one becomes a citizen, and what the meaning of citizenship is. Edited by a leading authority in the field, this volume contains the key works which cover national, transnational and international aspects of the topic, and the book provides a particular focus on how constitutional law constructs and upholds the range of citizenship rights.--