 Another term for the groundlessness of the world of meaning is “nothingness.” Heidegger introduced this term to indicate the kind of self- and world-understanding that emerges in anxiety: because my practical identity is constituted by the practices I engage in, when these collapse I “am” not anything. In a manner of speaking I am thus brought face-to-face with my own finitude, my “death,” as the possibility in which I am no longer able to be anything. This experience of my own death, or “nothingness,” in anxiety can act as a spur to authenticity: I come to see that I “am” not anything but must “make myself be” through my choice. In commiting myself in the face of death—that is, aware of the nothingness of my identity if not supported by me right up to the end—the roles that I have hitherto thoughtlessly engaged in as one does now become something that I myself own up to, become responsible for. Heidegger termed this mode of self-awareness—awareness of the ultimate nothingness of my practical identity—“freedom,” and Sartre developed this existential concept of freedom in rich detail. This is not to say that Heidegger’s and Sartre’s views on freedom are identical. Heidegger, for instance, will emphasize that freedom is always “thrown” into an historical situation from which it draws its possibilities, while Sartre (who is equally aware of the “facticity” of our choices) will emphasize that such “possibilities” nevertheless underdetermine choice. But the theory of radical freedom that Sartre develops is nevertheless directly rooted in Heidegger’s account of the nothingness of my practical identity.