This volume contains papers by a group of leading experts on Aristotle and the later Aristotelian tradition of Neoplatonism. The discussion ranges from Aristotle's treatment of Parmenides, the most important pre-Socratic Greek philosopher, to Neoplatonic and medieval use of Aristotle, for which Aristotle himself set guidelines in his discussions of his predecessors. Traces of these guidelines can be seen in the work of Plotinus, and that of the later Greek commentators on Aristotle. The study of these commentators, and the recognition of the philosophical interest and importance of the ideas which they expressed in their commentaries, is an exciting new development in ancient philosophy to which this book makes a unique and distinguished contribution.