Philosophical Works by René Descartes collects the foundational writings of the French philosopher and mathematician who famously declared, “Cogito, ergo sum” (“I think, therefore I am”). His works—including Discourse on the Method, Meditations on First Philosophy, and Principles of Philosophy—introduce the method of doubt and the mind-body dualism central to modern Western thought. These writings revolutionized philosophy and science, emphasizing reason, skepticism, and individual inquiry. Descartes is often hailed as the father of modern philosophy.
