This book explores disrupted youth cohesion in France within the context of multiple ongoing global economic, migratory, social, political, and security-related crises. While these trends can be observed in numerous Western societies, France provides a unique case study of various anti-cosmopolitan and anti-Enlightenment movements shaping youth conditions and reconfiguring relationships between the individual, the group, and society. The authors undertook in-depth interviews with French young people between the ages of 18 to 30 years old to inquire into how they experience "vivre ensemble" (living together) in a time of rising economic inequalities and multicultural tensions. Through these findings, they invite decision-makers, politicians, educators, and parents to propose a renewed narrative of social cohesion for youth who are not disillusioned, but deeply on edge. Mots clés : youth in society; French youth; French politics; Multiculturalism; Global crises; Globalization; youth experience