Heidegger's Eschatology' is a ground-breaking account of Heidegger's early engagement with theology, from his beginnings as an anti-Modernist Catholic to his turn towards an undogmatic Protestantism and finally to a resolutely a-theistic philosophical method. The book centres on Heidegger's developing commitment to an eschatological vision, derived from theological sources but reshaped into a central resource for the development of an atheistic phenomenological account of human existence. This vision originated in Heidegger's attempt, in the late 1910s, to formulate a phenomenology of religious life that would take seriously the inherent temporality of human existence. In this endeavour, Heidegger turned to two trends in Protestant scholarship: the discovery of eschatology as a central preoccupation of the Early Church by A. Schweitzer and the 'History of Doctrine' School, and the 'existential' eschatology of Karl Barth and Eduard Thurneysen, indebted to Kierkegaard, Dostoevsky, and Franz Overbeck.