Since Christianity is a world religion, changes in worldwide Christianity both reflect and affect global affairs and transnational issues. From its inception the IRM has demonstrated this in its holistic approach and global scope. In its pages are developments in the global landscape over the last one hundred years, although with significant shifts in the contributors. These developments include the breakdown of imperial Christendom and the rise of the present world order, how the people of the world are described and relate to one another, and the configuration of religions. Three trends in world Christianity impinge on contemporary mission: the rise of independent Christian movements and the migration of Christians result in an ever-increasing plurality of Christian expression. In view of this, this article argues that mission should be contextual, mission theology expressed in pneumatological terms, and the church understood as a dynamic movement.