Errol G. Katayama is Assistant Professor in the Department of Philosophy at Iowa State University.

"Does Aristotle maintain in the Metaphysics that artifacts are substances, or does he think they fall short of the criteria, whatever these are, of substantiality? This is the question Katayama sets out to answer in his book … On this ground alone Katayama's book deserves a careful reading by Aristotle scholars." — Ancient Philosophy"Katayama does an excellent job of constructing a powerfully sustained argument by marshalling texts from the Metaphysics and Aristotle's biological works. He takes the reader through some of the most complex and difficult topics in Aristotelian philosophy while always keeping the main line of argument highly visible. This is no mean feat." — Michael Ferejohn, Duke University"I like the methodological clarity and precision that isolates one problem from the interrelated network of metaphysical problems, clarifies it, hones the problem down to one key term ('apart from'), seeks a solution within the Metaphysics, decides that it is not to be found there, and finds it instead in Generation of Animals." — Martha Husein, Brock University

• Notes on Translations and Abbreviations Acknowledgments Introduction 1. Synopsis2. Project3. Method4. Context5. Developmental Issues6. Summary7. Notes on Appendix D Chapter One. Substances Most of All 1.1. Categories1.2. Z71.3. Status Quaestionis1.3.1. Z8, 1034a3–41.3.2. Z17, 1041b28–311.3.3. H3, 1043b22–231.3.4. 3, 1070a17–191.4. The Summary Chapter Two. Separate 2.1. The Argument in Its Context2.1.1. B4, 999b4–202.1.2. H3, 1043b14–232.1.3. 3, the Whole Chapter2.1.4. The Oddities2.1.5. An Objection2.2. Separation2.3. The Connection2.3.1. B4, 999b4–20 and Its Doublet K2, 1060b23–282.3.2. H3, 1043b14–232.3.3. 3, the Whole Chapter2.3.4. The Analysis2.3.5. The Two Senses of Ungenerable and Indestructible2.3.6. The Separation of the Form of a Composite—with and without Qualification2.3.7. Eternity As a Criterion of Substantiality Chapter Three. Eternal and Actual 3.1. Aporiai3.1.1. B4, 999b4–203.1.2. K2, 1060b23–283.1.3. K2, 1060a3–363.1.4. K2, 1060a3–27 and B4, 999a24–b203.1.5. K2, 1060a27–36 and B4, 1000b20–313.1.6. The Summary of B4 and K23.2. Aristotle's Criticism of Plato's Theory of Forms (A9, 991b1–9 and Its Doublet M5, 1079b35–1080a8)3.2.1. Separation3.2.2. That Which Will Set a Thing in Motion ()3.2.3. The Production of Artifacts Chapter Four. Individual or Universal 4.1. The Scope4.2. Eternity and Actuality4.3. The Dilemma4.3.1. The Controversy4.3.2. Textual Evidence4.3.3. Intelligibility Chapter Five. Principle 5.1. Arché5.1.1. Eternity5.1.2. Actuality5.1.3. Separation5.2. In Another and in Itself5.2.1. 3 and GA 2.15.2.2. Generation of Animals5.2.3. Actuality and Potentiality Chapter Six. Power 6.1. The Problem6.1.1. A New Principle6.2. Self-Realization6.2.1. The New Theoretical Framework6.2.2. Aristotle's Embryology6.3. Individual or Universal?6.3.1. Nutrition and Generation6.3.2. Inconsistency in the GA Chapter Seven. Artifacts 7.1. Pros Hen7.2. Pneuma7.3. Dinosaurs7.4. Pragmata Appendix A Appendix B Appendix C Appendix D Notes Bibliography General Index Index of Passages Cited Index of Greek Terms