This book contains a series of lectures delivered by Heidegger in 1935 at the University of Freiburg. In this work Heidegger presents the broadest and the most intelligible account of the problem of being, as he sees this problem. First, he discusses the relevance of it by pointing out how this problem lies at the root not only of the most basic metaphysical questions but also of our human existence in its present historical setting. Then, after a short ...