The world is facing rapidly increasing cycles of disruption and disorder. In the face of these challenges, mission leadership is stretched to adapt, trying to catch up with the pace of change and provide wisdom and action to help navigate these issues and further the mission God has bestowed on the church. This book focuses on the ways leadership is changing in the face of these matters, suggesting a new theoretical model for mission leadership. It reviews the idea of polycentrism through mission history, mission and church organizations, movement theory, and governance, identifying themes for polycentric mission leadership.