In the spring of 1929, Martin Heidegger and Ernst Cassirer met for a public conversation in Davos, Switzerland. They were arguably the most important thinkers in Europe, and their exchange touched upon the most urgent questions in the history of philosophy: What is human finitude? What is objectivity? What is culture? What is truth? Over the last eighty years the Davos encounter has acquired an allegorical significance, as if it marked an ultimate...