Anne Conway was an extraordinary figure in a remarkable age. Her Principles of the Most Ancient and Modern Philosophy is the most interesting and original philosophical work written by a woman in the seventeenth century. Her radical and unorthodox ideas are important not only because they anticipated the more tolerant, ecumenical, and optimistic philosophy of the Enlightenment, but also because of their influence on Leibniz. This newly translated and fully annotated edition includes an introduction that places Conway in her historical and philosophical contexts, together with a chronology of...

F. M van Helmont's Alphabet of Nature was one of many books published about language in the early modern period. The "language debate," as it has come to be called, was a topic of compelling interest to major figures such as Reuchlin, Rabelais, Paracelsus, Agrippa, Postel, Boehme, Kircher, Hobbes, Descartes, Comenius, Spinoza, Locke, Boyle, Newton, and Leibniz. At issue were profound questions about whether language is natural or artificial, ordained by God or created by man. The answers given entailed a web of consequences that could lead to arrest, imprisonment, even execution. It is...