Benedict de Spinoza (1632-77) was one of towering philosophers of the seventeenth century, described by Bertrand Russell as 'the noblest and most lovable of all the great philosophers'. His work investigated some of the deepest questions of philosophy and whilst renowned for his metaphysics, he also made significant contributions to understanding the human mind, the emotions and moral philosophy. In this outstanding introduction to Spinoza's philosophy, Michael Della Rocca takes Spinoza's fundamental argument that everything exists for a reason - known as his 'principle of sufficient reason' - as the key to unlocking his thought. Ideal for those coming to Spinoza for the first time as well as those already acquainted with his thought, "Spinoza" is essential reading for anyone studying philosophy and also those in related subjects such as religion and history.