Orthodox Christianity has been in the middle of two of the most cruel wars in post-Cold War Europe, in Southeastern Europe with the Ex-Yugoslavien wars and in Russia's war against Ukraine. In both cases, there prevails a general perception of a natural inclination of Orthodoxy to patriarchism, violence and harmful identity politics. Research on the theology of peace, nonviolence and conflict-trasnformation in Orthodoxy, on the contrary, is still limited, and Christian ecumenical peace ethics often come without any orthodox perspective. With the project "Orthodoxy and Social Peace" (part of the research network "Cooperation and Conflict in Eastern Europe: The Consequences of the Reconfiguration of Political, Economic, and Social Spaces since the End of the Cold War" (KonKoop)), there is an attempt to open up a research agenda and explore the Orthodox approaches to a peaceful communal life. Although it comes without a structured socio-ethical system, Orthodoxy bears ideas of nonviolent conflict transformation, which go beyond the traditional focus on individual salvation and a strong alliance of political and ecclesial leadership. The paper will present some of these concepts and theological options and discuss the potential of Orthodox tradition to contribute to ecumenical and inter-religious efforts of nonviolent theology and action.