Abstract: This chapter begins with an account of the life of Spinoza. It then discusses his great work, the Ethics, and the proof of its fundamental claim that there is just one substance, and that everything else which in any manner exists is a mode of it. There follows an account of Spinoza’s form of determinism and its ethical and religious significance and of his distinction between rational and irrational action. Finally there is a discussion of Spinoza’s views on institutionalized religion, and on Jesus. The chapter ends by asking whether Spinozism offers a ‘personal religion’.

Keywords: Spinoza, Ethics, substance, mode, Spinozism, metaphysics, God, religion,