D’Alembert praised the 16-year-old’s gifts, taught him and became a close friend. The youngest of Diderot’s Encyclopaedists, he was a regular at d’Holbach’s salon, and wrote a biography of another good friend, Voltaire. He encouraged Monge to submit his research to the Académie des Sciences, and Legendre to write what became a classic geometry textbook. He was one of the first mathematicians Lagrange met when he came to Paris, and helped liberalise Franklin’s views on slavery and racial equality. He posthumously edited out pious references to God in his correspondent Euler’s published letters.

# Marquis de Condorcet

## Marquis de Condorcet knew…

- Philippe Pinel
- Roger Joseph Boscovich
- Jérôme Lalande
- Antoine Lavoisier
- Horace-Bénédict de Saussure
- Félix Vicq d'Azyr
- Charles Bossut
- Thomas Paine
- Richard Price
- Thomas Jefferson
- Adrien-Marie Legendre
- Anne Robert Jacques Turgot
- Pierre-Simon Laplace
- Voltaire
- Leonhard Euler
- Joseph Louis Lagrange
- Jean le Rond d'Alembert
- Gaspard Monge
- Denis Diderot
- Baron d'Holbach
- Benjamin Franklin
- Alexis Clairaut