A new canon has developed in the last 75 years. Visionary thinkers worldwide have spoken out in defense of the earth and to emphasize our central role in its restoration as a result of humans’ irreversible impact on life as we know it. Their sayings have persisted over time and have evolved into a movement’s classics. Together, these volumes highlight the depth of environmental thought and illustrate how to create a more just, rational, and environmentally friendly world.