This volume is a multilevel and multidisciplinary study of radicalization in the Balkans and MENA regions. It takes a dynamic approach embracing the complexity of the social, political and economic contexts under study. Moving away from unidimensional and security-centred research on the topic, each chapter adopts a participatory and inclusive perspective, engaging communities, youth and women as significant stakeholders in building a better understanding of the dynamics of the radicalization of youth in these regions. The multiple case studies presented here cover several macro drivers of radicalization to reveal the interactions and interrelations of individuals with meso-institutions and backgrounds such as family, neighbourhood, school, peer groups, religious and ethnic communities, political parties, etc. Consequently, the volume addresses several gaps in the literature regarding radicalization and violent extremism: it is based on firm empirical evidence; it allows for comparisons between social contexts in one specific country and between countries sharing macro similarities but also differences; it proposes a fruitful dialogue and collaborations between academics, researchers and civil society experts; and, finally, it offers decentralized perspectives on extremism in the West. This volume is an important addition to a topic that is of interest to researchers across the social sciences, and to think tanks and policy makers working on/in these regions.