The chapter examines Hannah Arendt’s critique of martin Heidegger and concentrates on the way Arendt tries to subvert the Heideggerian paradigm of worldlessness. While for Heidegger, the ontological paradigm of worldlessness was the lifeless stone, in Arendt’s book biological life itself emerges as the worldless condition of the political world of publicity. The theoretical challenge bequeathed to us by Arendt is to draw the consequences of the simple fact that life is worldless. The worldlessness of life, therefore, becomes a genuine condition of impossibility for politics: it makes politics possible, but at the same time it threatens the very existence of politics. The chapter traces the development of this argument in three of Arendt’s major works: The Origins of Totalitarianism, The Human Condition, and The Life of the Mind.