This sixth edition includes eleven major new additions, including Plato's Symposium and selections from Aristotle's On Interpretation, Augustine's On Free Choice of the Will, and J L Austin's Sense and Sensibilia, as well as works of Sextus Empiricus, Boethius, Maimonides, Gersonides, Ockham, and William James. Selections from Aristotle's Nicomachean Ethics, Aquinas' Summa Theologiae, Hume's Treatise, and Russell's Problems of Philosophy have been expanded, while Plato's Republic, Hobbes' Leviathan, and Mill's On Liberty have been further abridged. In all, complete texts or substantial selections from fifty-two philosophical masterpieces are presented-in preeminent and thoughtfully annotated translations and editions, with Introductions by a team of distinguished scholars.