Abstract
This massive study of the history of ancient philosophy is the result of the author's twenty-five years of research while teaching at the Catholic University of Milan, Italy. The importance and popularity of the work is shown by the fact that at the time of the completion of the fifth volume in January of 1979, the first four volumes had already gone through either two or three editions. Reale's work has been preceded by many scholarly studies in the field of ancient Greek philosophy, including the translation into Italian of Aristotle's Metaphysics and, for the first time ever, of Theophrastus's Metaphysics. One of Reale's works has been translated into English by John R. Catan under the title, The Concept of First Philosophy and the Unity of the Metaphysics of Aristotle. The general plan of Reale's.