The author explores the concept of sustainable peace which she regards as a major aspiration of the modernecumenical movement in the post World War 2 period. Many who promote official ecumenism consider justice and freedom as two of the constitutive elements of sustainable peace and a condition for human existence. As part of this discussion she views the tension between voluntarily chosen evangelical poverty and forced poverty that arise in ecumenical discussions as a major challenge to sustainable peace in the 21st century. She introduces the concept of informal ecumenism as the...