Questions of citizenship are of crucial importance in a world of globalisation, international migration, transnational connections and 'new' multicultural societies that have formed on the foundation of nineteenth century Nation States. Who belongs to the State and who is excluded, and on what grounds? What is implied by concepts such as transnational citizenship, supranational citizenship, and regional citizenship? How do we deal with conceptions of dual or multiple citizenship? This volume seeks to address these and other related issues philosophically, theoretically and methodologically. The authors come from several academic disciplines and thus the volume represents an interdisciplinary approach to citizenship analysis.