In this book twelve outstanding historians of early modern philosophy undertake a study of the philosophy of Johannes Clauberg (1622-1665). Clauberg was not only among the first followers of Descartes (whose philosophy he taught from 1650 in Herborn and from 1652 until the end of his life in Duisburg) but also assured its survival as an academic philosophy by giving it a more traditional and more didactic expression. A first group of articles deals with Clauberg's early metaphysics as it found its expression in his Ontosophia of 1646 (republished with very considerable changes in...