Book excerpt: What is the place of young people in society today? This book presents a searching and comprehensive picture of youth, demonstrating both its diversity and singularity, and helping to dispel many of the myths, discriminations, stigmas and prejudices attached to this segment of society. Drawing on a vast empirical research exercise including over 8000 interviews and 40 focus groups in eight metropolitan areas of Brazil, this book explores the most important aspects of young people's social participation and the resulting challenges for public policy. With clear resonance beyond Brazil, this research is designed to inform youth policy strategies in the developing and developed world.