The Young Descartes: Nobility, Rumor, and War

René Descartes is best known as the man who coined the phrase "I think, therefore I am." But though he is remembered most as a thinker, Descartes, the man, was no disembodied mind, theorizing at great remove from the worldly affairs and concerns of his time. Far from it. As a young nobleman, Descartes was a soldier and courtier who took part in some of the greatest events of his generation—a man who would not seem out of place in the pages of The Three Musketeers.

In The Young Descartes, H...