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thumb|The circled dot was used by the Pythagoreans and later Greeks to represent the first metaphysical being, the Monad or The Absolute. Monism attributes oneness or singleness () to a concept, such as to existence. Various kinds of monism can be distinguished: Priority monism states that all existing things go back to a source that is distinct from them; e.g., in Neoplatonism everything is derived from The One. In this view only the One is ontologically fundamental or prior to everything else. Existence monism posits that, strictly speaking, there exists only a single thing, the universe,