Rene Descartes has been called both the Founder of Modern Philosophy and the Father of Modern Mathematics. Though he studied law early in his life, he never actually practiced. He instead became interested in seeing the world and finding "truth." His travels led him to discover an interest in science and mathematics, and he devoted his life to the practice and study of these. He died shortly after becoming tutor to Queen Christina of Sweden - he was believed to have contracted pneumonia, but other records say he may have been poisoned.

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Available books:

• The Principles of Philosophy
• Selections from the Principles of Philosophy