René Descartes

René Descartes (1596–1650) was a French philosopher, mathematician, and scientist widely recognized as the father of modern Western philosophy. Born in La Haye en Touraine, he received a Jesuit education and initially pursued a military career before dedicating himself to intellectual pursuits. Descartes revolutionized philosophical methodology by developing systematic doubt, a process of methodically questioning all beliefs to find indubitable truths. His most famous conclusion, 'Cogito, ergo sum' (I think, therefore I am), became the foundation of modern epistemology and established consciousness as the starting point for knowledge. In mathematics, he developed Cartesian coordinates, bridging geometry and algebra and founding analytic geometry. His philosophical dualism—distinguishing mind (res cogitans) from matter (res extensa)—profoundly influenced centuries of philosophical debate. Though some of his scientific conclusions were eventually superseded, Descartes' methodological rigor and emphasis on reason established intellectual standards for the Scientific Revolution. His work remains central to philosophy, mathematics, and the history of Western thought.