This foundational book is unique in that it provides a historical, cross-cultural context for understanding and advancing the ongoing spiritual ecology revolution, considering Indigenous and Asian religious traditions as well as Western ones. Most chapters focus on a single pioneer, illuminating historical context and his/her legacy, while also connecting that legacy to broader concerns. Coverage includes topics as diverse as Henry David Thoreau and the Green Patriarch Bartholomew’s decades-long promotion of environmentalism as a sacred duty for more than 250 million members of the Orthodox Church worldwide.