----Henri Bergson is the author of numerous works including Matter and Memory, Creative Evolution and Time and Free Will. His work has been influential for many thinkers such as Walter Benjamin, Maurice Merleau-Ponty and Gilles Deleuze. ----Drew Burk is a graduate and technical director at the European Graduate School. He is the translator of such philosophers as Jean Baudrillard, Jacques Derrida and Paul Virilio. ----What does laughter mean? What is the fundamental element of the laughable? What common ground can be found between the grimace of a clown, a play on words, a similar situation in a burlesque and a scene of high comedy? What method of distillation will invariably yield us the same essence from which so many different products borrow either their obtrusive odor or their delicate perfume? The greatest of thinkers, from Aristotle on down, have tackled this tiny problem, which has a knack of baffling every effort, of slipping away, escaping only to pop up again, as a lively challenge to philosophical speculation.