Nature religions look to rivers, lakes and oceans for inspiration and spiritual transformation. 'Deep Blue' brings together the work of influential scholars in the field of nature religion, ranging across anthropology, mythology, sociology and psychology. The essays examine the interrelationship between spiritual practice, critical thinking, and environmental concern. Tracing the ancient history of humanity's close relationship with both salt and fresh water, the book calls for a sustainable relationship with water in contemporary western culture. 'Deep Blue' will be of interest to students of paganism and religion, environmental researchers and activists, and all those involved in the intersection between religion and ecology.