As an umbrella term for nature-based methods of physical and psychological healing, ecotherapy points to the need to reinvent psychotherapy and psychiatry as if nature and the human-nature relationship matters. It takes into account the latest scientific understandings of our universe and the deepest indigenous wisdom. This perspective reveals the critical fact that people are intimately connected with, embedded in, and inseparable from the rest of nature. Grasping this fact deeply shifts our understanding of how to heal the human psyche and the currently dysfunctional and even lethal human-nature relationship. It becomes clear that what happens to nature for good or ill impacts people and vice versa, leading to the development of new methods of individual and community psychotherapeutic diagnosis and treatment.