The nature of peace / Peter Verbeek and Benjamin A. Peters -- A social-psychological perspective on the proximate causation of peaceful behavior : the needs-based model of reconciliation / Nurit Shnabel -- Inclusion as a pathway to peace : the psychological experiences of exclusion and inclusion in culturally diverse social settings / Sabine Otten, Juliette Schaafsma, and Wiebren S. Jansen -- The peacekeeping and peacemaking role of chimpanzee bystanders / Teresa Romero -- The experiential peacebuilding cycle : grassroots diplomacy, environmental education, and environmental norms / Saleem H. Ali and Todd Walters -- The developmental niche for peace / Darcia Narvaez -- Children's peacekeeping and peacemaking / Cary J. Roseth -- The role of relationships in the emergence of peace / Ellen Furnari -- Reintegration of former child soldiers : communal approaches to healing the wounds and building peace in postconflict societies / Michael Wessells and Kathleen Kostelny -- Keeping the peace or enforcing order : overcoming social tension between police and civilians / Otto Adang, Sara Stronks, Misja van de Klomp, and Gabriel van den Brink -- Constitutions as peace systems and the function of the costa rican and japanese peace constitutions / Benjamin A. Peters -- Exploring the village republic : gandhi's oceanic circles as decentralized peace systems / Jo�am Evans Pim -- Building peace benefits / Daniel Hyslop and Thomas Morgan -- The evolutionary logic of human peaceful behavior / Douglas P. Fry -- Trans-species peacemaking : our evolutionary heritage / Harry Kunneman -- Natural peace / Peter Verbeek.