The past fifteen years have witnessed a renaissance in the study of the history of philosophy, with special attention devoted to the seventeenth century and the work of Descartes and Leibniz. The essays in this collection open new pathways to the study of Leibniz, and will be welcomed not only by historians of philosophy but also by those contemporary philosophers who use logic and the philosophy of language to address metaphysical questions — since Leibniz was the first philosopher to do just that.