'This is a very ambitious book. Beginning with the premise of scientific realism (explained clearly in the first six pages), Churchland aims at little less than a 'transvaluation of all values'. If some of Churchland's more glowing descriptions sound rather like The Tao of Science, that is probably all to the good; the consequences drawn are important, vivid, and much better calculated to give life to the philosophical issues than aridly abstract discussions … I recommend the reading of this book to scientific realists and to diehard empiricists alike.' Bas C. Van Fraassen, The Canadian Journal of Philosophy