This comprehensive volume focuses on the world's religions and the changes they have undergone as they become more global and diverse in form.  It explores the religions of the world not only in the regions with which they have been historically associated, but also looks at the new cultural and religious contexts in which they are developing. It considers the role of migration in the spread of religions by examining the issues raised for modern societies by the increasing interaction of different religions. The volume also addresses such central questions as the dynamics of religious innovation which is evidenced in the rise and impact of new religious and new spirituality movements in every continent.