Rene Descarte

Rene Descartes was a famous French mathematician, scientist and philosopher. He was arguably the first major philosopher in the modern era to make a serious effort to defeat skepticism. His views about knowledge and certainty, as well as his views about the relationship between mind and body have been very influential over the last three centuries.

Descartes was born at La Haye (now calledDescartes), and educated at the Jesuit College of La Flèche between 1606 and 1614. Descartes later claimed that his education gave him little of substance and that only mathematics had given him certain knowledge. In this lament he joins a chorus of seventeenth century philosophers including Bacon, Hobbes and Locke. In 1618 he went to Holland to serve in the army of Prince Maurice of Nassau, intravelled to Germany with that army. On the night of Nov ember 10, he had a series of dreams which he interpreted as signs that he would found a universal science. The most important influence on Descartes at this time was the mathematician Issac Beeckman, who stimulated Descartes by posing a number of problem s and discusiing issues in physics and mathematics with him. His first substantial work wasthe Regulae or Rules for the Direction of Mind written in 1628-9 but not published until 1701. This work shows Descartes interest in method which he shared with many sixteenth and seventeenth century scientists, mathematicians and philosophers.

One source of this interest in method was ancient mathematics. The thirteen books of Euclid's Elements was a model of knowledge and deductive method. Buthow had all this been achieved? Archimedes had made many remarkable discoveries. How had he come to make these discoveries? The method in which the results were presented (sometimes called the method of synthesis) was clearly not the method by which these results were discovered. So, the search was on for the method used by the ancient mathematicians to make their discoveries (the method ofanalysis). Descartes is clearly convinced that the discovery of the proper method is the key to scientific advance. For a more extended and detailed discussion of these methods, see John Cottingham , The Rationalists, Oxford University Press, Oxford, 1982. Chapter 2.

In November 1628 Descartes was in Paris, where he made himself famous in a confrontation with Chandoux. Chandoux claimed that sciencecould only be based on probablitiies. This view reflected the dominance in French intellectual circles of Renaissance skepticism. This skptical view was rooted in the religious crisis in Europe resulting from the Protestant Reformation and had been deepened by the publication of the works of Sextus Empiricus and reflections on disagreements between classical authors. It was strengthend again byconsiderations about the differences in culture between New World cultures and that of Europe, and by the debates over the new Copernican system. All of this had been eloquently formulated by Montaigne in his Apology for Raymond Sebond and developed by his followers. Descartes attacked this view, claiming only that certainty could serve as a basis for knowledge, and that he himself had a method forattaining such certainty. In the same year Descartes moved to Holland where he remained with only brief interruptions until 1649.

In Holland Descartes produced a scientific work called Le Monde or The World which he was about to publish in 1634. At the point, however, he learned that Galileo had been condemned by the Church for teaching Copernicanism. Descarte s' book was Copernican to thecore, and he therefore had it supressed. In 1638 Descartes published a book containing three essays on mathematical and scientific subjects and the Discourse on Method. These works were written in French (rather th an Latin) and were aimed at the educated world rather than simply academics. In 1641 Descartes followed this with the Meditationes de Prima Philosophia (Meditations on First Philosophy)....