Frédéric Le Lelong's insightful book, 'Western Philosophers: René Descartes,' offers an in-depth examination of one of the most pivotal figures in Western thought. This comprehensive study delves into Descartes' foundational contributions, including his revolutionary method of doubt, the iconic 'Cogito, ergo sum' (I think, therefore I am), and his dualistic view of mind and body. Le Lelong meticulously analyzes how Descartes laid the groundwork for modern philosophy, science, and mathematics, influencing generations of thinkers. The book navigates the complexities of Cartesian philosophy, making it accessible while highlighting its profound and lasting impact on the intellectual landscape of the West.