Pantheism is the belief that the universe (or nature as the totality of everything) is identical with divinity, or that everything composes an all-encompassing, immanent God. Pantheists thus do not believe in a distinct personal or anthropomorphic god. Some Eastern religions are considered to be pantheistically inclined.
Pantheism was popularised in the West as both a theology and philosophy based on the work of the 17th-century philosopher Baruch Spinoza,:p.7 whose book Ethics was an answer to Descartes' famous dualist theory that the body and spirit are separate. Spinoza held the monist view that the two are the same, and monism is a fundamental part of his philosophy. He was described as a "God-intoxicated man," and used the word God to describe the unity of all substance. Although the term pantheism was not coined until after his death, Spinoza is regarded as its most celebrated advocate.