Global citizenship education is an essential topic in an increasingly interconnected world. Indeed the need for inclusive and globally conscious education, embedded in cosmopolitanism, is recognised as a way to prepare individuals to navigate diverse cultures, address global challenges, and actively participate in a globalised world. Being both scientific and political, these challenges require an interdisciplinary exploration of citizenship education, merging sociology, philosophy, as well as education and training sciences. To do this, Global Citizenship Education: Modern Individualism under the Test of Cosmopolitanism offers a framework that integrates Durkheim's holistic approach with critical republicanism. The book is also rooted in the analysis of data collected through GlobalSense, a research project that focuses on preparing teachers to navigate the complexities of GCE within an international context. By presenting both a theoretical reflection and an analysis of an international training program within universities, this book can be of interest to academics, teacher trainers and (future) teachers themselves.