In a preface written for the French translation of his Infancy and History: The Destruction of Experience, Giorgio Agamben states that "every written work can be regarded as the prologue (or rather, the broken cast) of a work never penned, and destined to remain so, because later works, which in turn will be the prologues or the moulds for other absent works, represent only sketches or death masks."' This remark, which describes every work of art as a preface, does not simply refer to the impossibility of translating the all of life into a single work. Nor does it simply refer to those purely empirical obstacles which stand in the way of creation, preventing the work of art from attaining the plenitude it might have hoped for had not greedy wine-merchants, harrying tailors, and eloquent panderers distracted the Great Minds from their tasks. Instead, in returning every work of art to its originary hesitation, in evoking the oscillation between work and draft, effort and accomplishment, Agamben invokes a much richer and darker potentiality lying at the heart of the work. It is this richer and darker potentiality that constitutes the central concern of Agamben's thought and that gives its name to this collection. Yet what is named in this potentiality? What is the nature of the potentiality of which Agamben speaks? What is this potentiality the potential for? Before advancing in the investigation of this question, let us look briefly at what is gathered together under its name. In this collection of essays by a thinker of unquestionable brilliance one finds a number of axes. The first of these is that of chronology: the essays presented in this volume stretch from 1975 to 1996 and thus cover the period during which works such as Stanzas, Infancy and History, The Idea of Prose, and The Coming Community were prepared and published. The second axis-the one that dictates the ordering of the texts found in this volume and which is the choice of the editor and not the author-is a thematic one: the book is divided into four sections entitled