ABSTRACT
This chapter addresses the key concepts and ontological categories that Heidegger created after his “first beginning”, from The Fundamental Concepts of Metaphysics (1929–1930) to his philosophical turn in Beiträge zur Philosophie published in 1936–1938. Here, the enigmatic concept of Ereignis was coined, followed by its innovative conception of Being in the Question concerning Technology, the World of Gestell, Gelassenheit, and the Geviert, in which Heidegger intended to establish a renewed understanding of the modern world that threatens the destruction of the planet and to supersede metaphysical thinking for humanity to attain the Truth of Being. The chapter contrasts Heidegger's philosophical developments with Michel Haar's critical responses and the appraisal of the ontological regime of Capital as the efficient cause that drives the total mobilization of the World of Gestell. It follows to critically discuss Life's grounding on Earth and in human existence; the plunging of Being and the rooting of Life; the rule of Technique and the unbinding of Life; and the ungroundedness of Being and the sustainability of Life.
