Book excerpt: Process Philosophy surveys the basic issues and controversies surrounding the philosophical approach known as "process philosophy." Process philosophy views temporality, activity, and change as the cardinal factors for our understanding of the real—process has priority over product, both ontologically and epistemically. Rescher examines the movement’s historical origins, reflecting a major line of thought in the work of such philosophers as Heracleitus, Leibniz, Bergson, Peirce, William James, and especially A. N. Whitehead. Reacting against the tendency to associate process philosophy too closely with this last-named thinker, Rescher writes, “Indeed, one cardinal task for the partisans of process at this particular juncture of philosophical history is to prevent the idea of 'process philosophy' from being marginalized through a limitation of its bearing to the work and influence of any one single individual or group.” This book will appeal to both students and professors of philosophy. Those teachers who have not been trained in process philosophy will welcome this new text by one one of North America’s foremost philosophers as a perspicuous and informative introduction.