The psychological components of a sustainable peace moves beyond a prevention-orientation to the study of the conditions for increasing the probabilities for sustainable, cooperative peace. Such a view combines preventative scholarship with a promotive-orientation to the study of peaceful situations and societies. The contributors to this volume examine the components of various psychological theories that contribute to the promotion of a harmonious, sustainable peace. Underlying this orientation is the belief that promoting the ideas and actions which can lead to a sustainable, harmonious peace will not only contribute to the prevention of war, but will also lead to more positive, constructive relations among people and nations and to a more sustainable planet.