Eudemus of Rhodes was a pupil of Aristotle in the second half of the fourth century BCE. When Aristotle died, having chosen Theophrastus as his successor, Eudemus returned to Rhodes where it appears he founded his own school. His contributions to logic were significant: he took issue with Aristotle concerning the status of the existential "is," and together with Theophrastus he made important contributions to hypothetical syllogistic and modal logic. He wrote at length on physics, largely following Aristotle, and took an interest in animal behavior. His histories of geometry, arithmetic,...

In this commentary on Aristotle Physics book eight, chapters one to five, the sixth-century philosopher Simplicius quotes and explains important fragments of the Presocratic philosophers, provides the fragments of his Christian opponent Philoponus' Against Aristotle On the Eternity of the World, and makes extensive use of the lost commentary of Aristotle's leading defender, Alexander of Aphrodisias.

This volume contains an English translation of Simplicius' important commentary, as well as a detailed introduction, explanatory notes and a bibliography.