The great dream of philosophers and scientists for millennia has been to give us a complete account of the order of things. A powerful articulation of such a dream in this century has been found in the idea of a unity of science. With this manifesto, John Dupré systematically attacks the ideal of scientific unity by showing how its underlying assumptions are at odds with the central conclusions of science itself. In its stead, the author gives us a metaphysics much more in keeping with what science tells us about the world. Elegantly written and compellingly argued, this provocative book will be important reading for all philosophers and scholars of science.