Training and education for Diakonia, for social care, support for the vulnerable, advocacy for those marginalized and suffering from injustices today needs high quality resources and intercultural, contextual as well as interdisciplinary approaches. This was the core conviction of major institutions of diaconal work and research in Germany and some of their international partners to come together in 2018 to plan for an International Handbook on Ecumenical Diakonia. Conceptualized together by the Institute for Diakonic Science and Management (IDM) in Bielefeld/Bethel, the United Evangelical Mission, an international communion of 38 churches in Africa, Asia and Europe, the v.Bodelschwingh Foundation, Bread for the World, Desk for Theology and Ecumenism, Diakonia Germany, the All African Conference of Churches (AACC), and also supported by the Desk for Ecumenical Diakonia in the World Council of Churches a project was developed to bring together key resources on biblical-theological foundations, regional and confessional expressions, new themes and trends and educational approaches and curriculum models for diakonia and Christian social services which can enrich current training courses for diakonia and widen the horizon by inter-contextual and inter-cultural perspectives.