What is the theme in Anasazi by Gary Snyder?

Humans and the environment is the main theme of the book. Gary Snyder the poet is inseparable from Gary Snyder the anthropologist. He has a distinct interest in studying human life not in isolation, but as an integral part of everything that is natural. The need to recognize the earth itself as a living being—along with all its trees, rocks, plants, and animals, including humans—is a major theme in much of Snyder's work, and such is the case for "Anasazi." Throughout the poem, there is interplay of humans, animals, plants, even sandstone and rock canyons.