In , a diverse group of researchers and scholar-practitioners working in academia, nongovernmental, and international organizations examine the proactive roles of girls and boys in promoting security for themselves and their families. They discuss the disproportionate suffering and specific vulnerabilities of the young during and after war, as well as the international legal frameworks created to protect and empower these groups in post-conflict environments. The authors provide examples of initiatives to help young people escape the traps of victimhood and voicelessness and actively engage in rebuilding their communities and nations, and they examine international and national efforts to provide for the security of children and young people in post-conflict environments. Children and youth are essential catalysts for the successful rebuilding of war-torn societies. Many will reach adulthood as new social, economic, and political orders are being consolidated, as first elections are held, and as local groups take over assistance and rebuilding efforts. The young post-war generation will become the next leaders, parents, and teachers, hence ensuring its active role in post-conflict peacebuilding today could help build a sustainable peace tomorrow.