In 2009，Martin Hägglund，a professor of comparative literature at Yale University，published a book named Radical Atheism：Derrida and the Time of Life，which caused a huge debate in the academic world.Throughout the current results of Derrida's research，most scholars believe that Derrida's later thoughts have experienced an “ethical turn”.Hägglund opposed this mainstream statement，and he took a different approach and reinterpreted Derrida's thoughts from a temporal perspective，which provided us with a new vision.He pointed out that there never was a rupture in Derrida's thoughts，and the concept of “radical atheism” run through from beginning to end.The so-called “radical atheism” is a critique of the normative ethical ideals and an openness to “the coming of the future”.In addition，it is also a rejection of the concepts of“permanence” and “absolute immunity” and an affirmation of the limitation of life and the “autoimmunity” .