Marquis de Condorcet

Jean-Antoine de Caritat

1743 (Ribemont, France) – 1794 (Bourg-La-Reine)

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.

Leszek Kołakowski

1927 (Radom, Poland) – 2009 (Oxford)

Kołakowski said that Miłosz was overwhelmed with sadness. He met Adorno when he was briefly allowed to leave Poland, and was friends with Thompson for years through correspondence before actually meeting in England. Lefebvre co-authored a book with him.

José Ortega y Gasset

1883 (Madrid) – 1955 (Madrid)

Heidegger and Ortega met each other a number of times and were influential on each other’s work; Heidegger remembered him fondly. Unamuno was a correspondent, and Valéry met him when he travelled to Spain. Ortega described Ocampo, when he met her on the first of his several visits to Argentina, as the Mona Lisa of the Pampas. She was equally enchanted by him, they became occasional lovers, and he chose the title for the influential intellectual review she published.

José Ortega y Gasset knew…

  • Paul Valéry
  • Martin Heidegger
  • Victoria Ocampo
  • Miguel de Unamuno

Joseph Priestley

1733 (Birstall, England) – 1804 (Northumberland, Pa.)

Josiah Wedgwood funded Priestley’s experiments and was a fellow-member of the Lunar Society, as were Boulton, Watt, Darwin and Keir (who helped him with experiments). Wilkinson was his wife’s brother, Hill helped run his Sunday school, Price preceded him in his Hackney ministry, and Banks offered to get him on one of Cook’s voyages. He met and corresponded with Lavoisier, who took all the credit for the discovery of oxygen. Blake knew him through Johnson. Silliman was impressed by his discovery of soda water, Jefferson sought his curricular advice, and Franklin (a Lunar Society guest) called him an “honest heretic.”

Johann Wolfgang von Goethe

1749 (Frankfurt-am-Main, Germany) – 1832 (Weimar)

Goethe met Herder as a student, and visited Lavater in Switzerland ( a great correspondent, he helped Lavater with his magnum opus on physiognomy). Hummel like him was attached to the Weimar court, where Schopenhauer’s mother had a salon. Schiller approached him in admiration: they became friends and colleagues for life. Carlyle, Schelling, Schlegel, Byron, Hegel and Fichte were among intellectuals drawn across Europe to visit him (Manzoni and he just corresponded). Beethoven set several of his poems to music (though they did not get on personally), and the young Mendelssohn charmed the old man with his playing.

Jeremy Bentham

1748 (London) – 1832 (London)

Priestley was a correspondent and strong influence. Ricardo and James Mill were among the thinkers who gathered around Bentham. Smith, a regular correspondent, was persuaded by Bentham that interest-rates should be free. Dumont, a disciple and collaborator, published his writings and thus broadcast his ideas. Leigh Hunt was a friend, the irascible Hazlitt rented his house and publicly suggested that his ideas were over-rated, while Roget, invited to develop Bentham’s plans for a new design of ice-house, found his unconventional life too hard to stomach. George Bentham was his nephew, J. S. Mill his godson.

Jean-Paul Sartre

1905 (Paris) – 1980 (Paris)

Sartre met Nizan and Aron at school, later salvaging Nizan’s reputation. He met Lévi-Strauss, Merleau-Ponty, Weil, Canguilhem and Hyppolite as a student: also de Beauvoir, becoming her famously lifelong intellectual and amatory (but not exclusive) partner. He, de Beauvoir and Merleau-Ponty founded a resistance group in WWII, which Gide and Malraux failed to support. He was dismissive of Bataille’s writings, and enjoyed swapping filthy stories with Camus (before they fell out). He wrote a foreword for Fanon, praised Genet, disputed marxism with Althusser, and suggested the faithful communist Arago go to Cuba.

Jean-Jacques Rousseau

1712 (Geneva) – 1778 (Ermenonville, France)

He contributed to Diderot and d’Alembert’s Encyclopédie, visited Diderot in prison, but belligerently fell out with them and d’Holbach. He and Voltaire antagonised each other, Voltaire accusing him of using his cleverness “to make us all look stupid.” Casanova visited him on a pretext, making fun of his eccentricity on the way home. Hume invited Rousseau to Britain during his self-imposed exile from Switzerland, but he soon accused Hume of plotting against him. Fuseli admired and met him but eventually broke with his ideas, while Ramsay painted him wearing his favourite fur-trimmed ‘Armenian’ outfit.

Jean le Rond d’Alembert

1717 (Paris) – 1783 (Paris)

Key player in the French Enlightenment. Diderot and d’Alembert were co-editors of the Encyclopédie, Rousseau as well as Buffon a noted contributor, and Voltaire one of the project’s greatest supporters. D’Alembert encouraged Monge to submit papers to the Académie des Sciences, helped the mathematicians Legendre, Condorcet and Lagrange up the professional ladder, but was put out to feel that Laplace’s subsequent work made his own obsolete. Hume, Smith and Gibbon were fellow attendees at d’Holbach’s salon. Rameau had been a friend, but disagreements over the Encyclopédie soured their relations. Casanova described him as the most modest man he’d ever known.

Claude Adrien Helvétius

1715 (Paris) – 1771 (Paris)

Gibbon met him at d’Holbach’s salon, which he frequented; Smith also met him in Paris. Rousseau and he respected each other, but had conflicting ideas about education. Buffon invited him to stay. Voltaire saw that he was no poet and urged him to write more plainly, was publicly critical of his ‘de l’Esprit’, but defended its right to exist. Diderot, another in d’Holbach’s circle, wrote a refutation of Helvétius’ ‘de l’Homme.’ He tried to dissuade his good friend Montesquieu from publishing some of the opinions in ‘Esprit des Lois’, but the book became a success. Where he died seems disputed.