Betty A. Reardon's groundbreaking work, originally authored in 1988, provides one of the first and clearest articulations of the field of peace education in theory and practice. Through reflection on her own experiences, Reardon assesses the state of peace education and offers a new comprehensive approach. She addresses the need to help educators and citizens alike understand what peace education is, why it is needed, and how it is and should be pursued. She investigates the root causes of the violent conditions facing society so that we can better understand how education can be used to interrupt the cycles of violence and create the conditions for sustainable peace and justice. Comprehensive peace education, for the author, takes place at every level, and in every subject area, of both formal and non-formal education. In this special 2021 Edition, Reardon provides a new, reflective introduction on the emerging needs and challenges to the field for the 21st century. Formal and non-formal educators, theorists, students and activists will find practical and transformative wisdom immediately applicable to diverse conditions and contexts in Comprehensive Peace Education. Betty A. Reardon is acknowledged around the world as one of the founders of the field of peace education. She has been extensively involved in the international peace education movement and has been published widely in the field. She is a co-founder of both the International Institute on Peace Education and the Global Campaign for Peace Education.