Widely praised for its accessibility and its concentration on the metaphysical issues that are most central to the history of Greek philosophy, <I>Greek Philosophy: Thales to Aristotle</I> offers a valuable introduction to the works of the Presocratics, Plato, and Aristotle. <P> For the Third Edition, Professor Allen has provided new translations of Socrates' speech in the <I>Symposium</I> and of the first five chapters of Aristotle's <I>Categories,</I> as well as new selections bearing on Aristotle's <I>Theory of Infinity, Continuity, and Discreteness.</I> The book also contains a general introduction which sets forth Professor Allen's distinctive and now widely accepted interpretation of the development of Greek philosophy and science, along with selective bibliography, and lists of suggested readings.