What is needed for something new to appear? According to Gilles Deleuze, one of themost brilliant contemporary philosophers, this question of "novelty" is the major problem posed byBergson's work. In this companion book to Bergson's Matter and Memory, Deleuze demonstrates both thedevelopment and the range of three fundamental Bergsonian concepts: duration, memory, and the élanvital. Bergsonism is also important to an understanding of Deleuze's own work, influenced as it isby Bergson.Gilles Deleuze is Professor of Philosophy at the University of Paris VIII,Vincennes/Saint Denis. Among his most recent books in translation are Nietzsche and Philosophy,Cinema: Image Movement and, with Felix Guattari, Anti-Oedipus, Kafka, and One Thousand Plateaus.HughTomlinson is the translator of Deleuze's Nietzsche and Philosophy and Kant's Critical Philosophy.Barbara Habberjam is a translator living in England.