A relatively new discipline operating on an ancient assumption: the deepest levels of the psyche are tied to the Earth (unlike environmental psychology, which looks in linear fashion at the impact of surround on psyche). Theodore Roszak, for instance, posits an “ecological unconscious” at the core of the psyche; Stephen Aizenstat describes a “world unconscious” similar to what early philosophers described as the anima mundi or world soul. As with deep ecology, ecopsychology insists that to be healthy, our relations with the Earth must be reciprocal, not exploitive. "Ecopsychology is the effort to understand, heal, and develop the psychological dimensions of the human-nature relationship (psychological, bio-social-spiritual) through connecting and reconnecting with natural processes in the web of life. At its core, ecopsychology suggests that there is a synergistic relation between planetary and personal well being; that the needs of the one are relevant to the other. " -- Robert Greenway, Amy Lenzo, Gene Dilworth, Robert Worcester, Linda Buzzell-Saltzman.