A lecture course that Martin Heidegger gave in 1927, The Basic Problems of Phenomenology continues and extends explorations begun in Being and Time. In this text, Heidegger provides the general outline of his thinking about the fundamental problems of philosophy, which he treats by means of phenomenology, and which he defines and explains as the basic problem of ontology.

Table of Contents:
Translator's Preface Translator's Introduction Introduction 1. Exposition and General Division of the theme 2. The concept of philosophy. Philosophy and world-view 3. Philosophy as science of being 4. The four theses about being and the basic problems of phenomenology 5. The character of ontological method. The three basic components of phenomenological method 6. Outline of the course Part One: Critical Phenomenological Discussion of Some Traditional Theses about Being Chapter One: Kant's Thesis: Being Is Not a Real Predicate 7. The content of the Kantian thesis 8. Phenomenological analysis of the explanation of the concept of being or of existence given by Kant 9. Demonstration of the need for a more fundamental formulation of the problem of the thesis and of a more radical foundation of this problem Chapter Two: The Thesis of Medeval Ontology Derived from Aristotle: To the Constitution of the Being of a Being There Belong Essence and Existence 10. The Content of the thesis and its traditional discussion 11. Phenomenological clarification of the problem underlying the second thesis 12. Proof of the inadequate foundation of the traditional treatment of the problem Chapter Three: The Thesis of Modern Ontology: The Basic Ways of Being Are the Being of Nature (res Extensa) and the Being of Mind (Res Cogitans) 13. Characterization of the ontological distinction between res extensa and res cogitans with the aid of the Kantian formulation of the problem 14. Phenomenological critique of the Kantian solution and demonstration of the need to pose the question in fundamental principle 15. The fundamental problem of the multiplicity of ways of being and of the unity of the concept of being in general Chapter Four: The Thesis of Logic: Every Being, Regardless of Its Particular Way of Being, Can Be Addressed and Talked About by Means of the "Is". The Being of the Copula 16. Delineation of the ontological problem of the copula with reference to some characteristic arguments in the course of the histroy of logic 17. Being as copula and the phenomenological problem of assertion 18. Assertional truth, the idea of truth in general, and its relation to the concept of being Part Two: The Fundamental Ontological Question of the Meaning of Being in General The Basic Structures and Basic Ways of Being Chapter One: The Problem of the Ontological Difference 19. Time and temporality 20. temporality [Zeitlichkeit] and Temporality [Temporalitat] 21. Temporality [Temporalitat] and being 22. Being and beings. The ontological difference Editor's Epilogue Translator's Appendix: A Note on the Da and the Dasein Lexicon