Book excerpt: This book describes the potential and challenges of cosmopolitanism from a philosophical and historical point of view. Through the prism of cosmopolitanism, this book considers how the recent surge in migration is affecting our current reality, while also taking stock of the contemporary potential of cosmopolitan ideas. It considers and compares the significance of religion and culture for the wider societal acceptance or rejection of refugees. Moreover, the book examines the European Court of Human Rights jurisprudence on immigration policies, non-refoulement, humanitarian law and gender. It presents empirically based research of a quantitative, qualitative and comparative nature regarding the determinants of attitudes towards cosmopolitanism and more generally concerning public opinion on migration issues, and reflects on conceptions of and attitudes towards citizenship, while also imagining new forms of citizenship. This book serves as a comprehensive overview and resource for migration scholars from the social sciences and the humanities, as well as students and other stakeholders in the fields of migration and human rights.