Descartes has been heralded as the first modern philosopher. He is famous for having made an important connection between geometry and algebra, which allowed for the solving of geometrical problems by way of algebraic equations.

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Works written: Meditations on First Philosophy,

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Died: 11 February 1650

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https://plato.stanford.edu/entries/descartes-works/#:~:text=Descartes%20has%20been%20heralded%20as,by%20way%20of%20algebraic%20equations.