Presents a lecture course given by Martin Heidegger in 1926 at the University of Marburg. First published in German as volume 22 of the "Collected Works", this book provides Heidegger's most systematic history of Ancient philosophy beginning with Thales and ending with Aristotle.

Translator's ForewordPreliminary RemarksPART ONE. General Introduction to Ancient Philosophy Chapter One. Working out of the central concepts and questions of ancient philosophy, with the first book of Aristotle's Metaphysics as guidelineChapter Two. The question of cause and of foundation as a philosophical questionPART TWO. The Most Important Greek Thinkers: Their Questions and Answers Section One. Philosophy up to PlatoChapter One. Milesian philosophy of natureChapter Two. HeraclitusChapter Three. Parmenides and the EleaticsChapter Four. The later philosophy of nature: Empedocles, Anaxagoras, and atomismChapter Five. Sophistry and SocratesSection Two. Plato's philosophyChapter One. Biography, secondary literature, and general characterization of Plato's questioningChapter Two. More concrete determination of the problem of Being in Plato's philosophyChapter Three. Interpretation of the dialogue, Theatetus: the connection between the question of the Idea of science and the question of BeingFirst definitionSecond definitionThird definitionChapter Four. Central concepts of Plato's philosophy in the context of the understanding of Being and the question of BeingSection Three. Aristotle's philosophyChapter One. On the problem of the development and of the adequate reception of Aristotle's philosophyChapter Two. The ontological problem and the idea of philosophical researchChapter Three. The fundamental questioning of the problematic of BeingChapter Four. The problem of motion and the ontological meaning of that problem. Chapter Five. Ontology of life and of DaseinAPPENDICES Supplementary Texts Excerpts from the Mörchen Transcription Bröcker TranscriptionEditor's AfterwordGreek-English Glossary