In a world marked by shifting paradigms and emergent challenges, The Routledge International Handbook on Social Exclusion and Radicalisation is a ground-breaking compilation that addresses the intricate relationship between social exclusion and radicalisation on a global scale. In response to the prevailing tendency to examine radicalisation from single-level or individualistic perspectives, this handbook takes a comprehensive approach by embedding radicalisation within the broader context of socio-political, economic, and cultural dynamics of exclusion and marginalisation. It assembles leading scholars from a variety of fields to offer a well-rounded understanding of social exclusion as a precursor to radicalisation on a global scale. Drawing from a diverse array of theoretical frameworks employing both quantitative and qualitative methodologies, this handbook examines processes of radicalisation and social exclusion in the Global North and South, as well as comparative and international trends experienced worldwide. This handbook will be a comprehensive resource for researchers and policy-makers seeking to understand the dynamics of radicalisation and for crafting evidence-based strategies aimed at fostering inclusion and pluralism. It will be of interest for scholars and students interested in understanding the complex levels of radicalisation and its social contexts from fields including sociology, political science, anthropology, social psychology, criminology, and international relations.