Separating communism from its metaphysical foundations, which include an abiding faith in the immutable laws of history and an almost holy conception of the proletariat, Gianni Vattimo and Santiago Zabala recast Marx's theories at a time when capitalism's metaphysical moorings-in technology, empire, and industrialization-are buckling. While Michael Hardt and Antonio Negri call for a return of the revolutionary left, Vattimo and Zabala fear this would...