Abstract

The third chapter gives an account of the debates over Cartesianism outlined below, which shifted from the University of Utrecht to Leiden, where the new philosophy was introduced by Adriaan Heereboord in the early 1640s, and was carried on by Johannes de Raey at the end of the decade. In Leiden, the quarrels over Cartesianism were prompted by the intervention of the theologian Jacob Revius, criticising Descartes’s philosophy as a source of Pelagianism in 1647. This gave rise to a series of attacks, replies, and counter-replies which would dominate Dutch Cartesianism well into the 1650s: Revius’s Methodi cartesianae consideratio theologica (1648), Statera philosophiae cartesianae (1650), and Cyriacus Lentulus’s Nova Renati Descartes sapientia (1651) offered a full-blown critique of Descartes’s philosophy, focusing on his metaphysics, method and on their uses in academia. Such critiques are analysed in this chapter as they brought about the first foundation of Cartesian philosophy after Descartes himself, namely, the development of a ‘Cartesian Scholastic’ by Johannes Clauberg, professor at Herborn and Duisburg. In fact, Clauberg’s defence and foundation of a Cartesian academic philosophy was not the effort of one philosopher, but was coordinated with De Raey and with other members of the Cartesian network in the Netherlands and in Germany (including Abraham Heidanus, Tobias Andreae and Christopher Wittich), as a means to avoid the bans on Cartesianism and to provide a decisive answer to the theologians. This coordinated strategy of defence is revealed by two letters of De Raey to Clauberg: their contents shed light on the background of Clauberg’s foundation, which constitutes the first, Cartesian reworking of the academic curriculum. In his works, indeed, Clauberg maintained a metaphysical foundation embodying rational-theological arguments, while providing at the same time a logical theory of the method for natural philosophy, as well as for law, theology and medicine. Yet, his concerns with the traditional structure of the curriculum led him to develop, besides a Cartesian first philosophy, also an ontosophia, whose object is being as such. This is considered by Clauberg not only in the light of the ‘first notions’ of mind and body, but also of those abstracted from concrete realities, as ‘unity’, ‘goodness’, ‘truth’, and so on. This ultimately results in the reduplication of metaphysics, which will be reduced by Clauberg’s followers – dealt with in the next chapters.