While only a few years ago the subject 'Mission and Religious Studies' was an integral part of Protestant faculties there has been now a fundamental change and chairs of Religious Studies and Intercultural Theology developed. Mission organisations sponsored by church institutions are still active, sometimes with a changed agenda, while mission organisations of free churches maintain a high importance. On the other hand in orthodox churches, where the active mission outside the 'canonical territory' used to contribute to the spread of Christianity, it is hardly practiced anymore. Hence, the ecumenical discourse on the new self-concept of mission and Mission Studies is an important desideratum. This volume offers a current contribution to that debate.