IDENTITY PHILOSOPHY is a system of philosophy which treats mind and matter, subject and object or thought and existence, as merely two aspects or expressions of the same ulti , mate reality (or underlying identity). There are many systems of philosophy which answer more or less to this general descrip tion, though different in other respects. Indeed some of them are on the verge of idealism, and some are on the verge of material ism. The most familiar instances of Identity Philosophies, ancient and modern, are the systems of the Eleatics, Spinoza, Fichte, Schelling and Hegel.
See BODY AND MIND, ONTOLOGY and the articles on the philosophers named above.