In this impassioned polemic, radical environmental philosopher Derrick Jensen debunks the belief in a hierarchy of nature and the superiority of humans. Vast and underappreciated complexities of nonhuman life are explored in detail; the paralysis of the scientific establishment on moral and ethical issues is confronted; and a radical new framework for assessing the intelligence and sentience of nonhuman life is put forth. A philosopher-poet of the environmental movement, Jensen sounds an urgent call for its liberation from human domination.