This comprehensive guide navigates the intersection of psychology, peacebuilding, and violence engagement among youth. Beginning with an exploration of psychology's role in social justice, it establishes the groundwork in restorative justice and peace education, areas ripe for psychological exploration. The book introduces the conceptualized peace framework, illuminating how young people interpret societal discourses to shape their identities within the context of peace and harmony. Through empirical examples, the framework's efficacy is demonstrated, followed by practical methods and future directions for educators, practitioners, and policymakers. Core to its mission is unravelling the psychological mechanisms underlying participation in peace education and restorative justice, probing how past experiences influence engagement and shape social identities. By addressing these questions, the book offers a roadmap grounded in theoretical development, bolstered by empirical case studies and methodological approaches, to guide scholars and students in fostering peaceful, harmonious societies.