An essay by Brian Morris that offers a comprehensive analysis of pantheism as both a religious ontology and a crucial ecological philosophy, written primarily to counter "hostile, unscholarly, and simplistic interpretations" of the worldview. Morris defines pantheism as the belief that divinity is an all-inclusive unity inseparable from the natural world and systematically contrasts this view with other metaphysical doctrines, including deism, theism, gnosticism, panentheism, and paganism. The historical scope of the work surveys classical expressions of this philosophy, focusing on figures such as Philosophical Taoism, the Stoics, and Baruch Spinoza. The essay concludes by summarizing the four defining features of pantheism: its integral ecological perspective, its foundation in ethical naturalism, its utilization of a dialectical approach, and its historical link to radical politics. This work establishes pantheism as a non-theistic worldview that rejects dualism, emphasizes living in harmony with nature, and is antithetical to structures of coercive power.