Philosophy › Reason, experience & Enlightenment › The Enlightenment
Voltaire
1694–1778· Philosopher· Politics, society & justice
Well documentedSolid records, texts or physical evidence.
French writer and wit, born François-Marie Arouet, who used satire to campaign for religious toleration, free speech and reason.
See it on the Philosophy map →The idea
Idea: fanaticism and superstition are the great enemies; his rallying cry was 'Écrasez l'infâme' ('Crush the infamous thing'), meaning intolerant church power. Exiled to England (1726–28), he admired its tolerance, Newton and Locke, and praised them in his Philosophical Letters (1734), which Paris burned. Candide (1759) mocked Leibniz's optimism. In the Calas affair (1762–65) he cleared a Protestant executed on false charges. Main objection: critics call him a brilliant polemicist rather than a systematic philosopher.
Why it matters
He made Enlightenment ideas fashionable and public, turning philosophy into a weapon against censorship and religious persecution.
Legacy and sources
About 20,000 of his letters survive, with plays, histories and tales. 'I disapprove of what you say, but I will defend to the death your right to say it' is Evelyn Beatrice Hall's 1906 summary, not his words.
Still debated
His real religious views are debated: a deist who mocked the Church, he still built a church at Ferney inscribed 'Voltaire erected this to God'.
Connections (2)
▸"The best of all possible worlds" was mocked by VoltaireWell documented
The connection
Voltaire turned Leibniz's optimism into satire. In Candide, the tutor Pangloss keeps insisting that all is for the best while he and his pupil suffer war, shipwreck, earthquake and the Inquisition. The 1755 Lisbon earthquake, which killed tens of thousands, had already moved Voltaire to write a poem attacking optimism.
When and how
Poem on the Lisbon Disaster (1756) and Candide, published anonymously in Geneva in 1759, quickly banned and a bestseller.
How we know
Candide parodies the doctrine directly, with Pangloss teaching 'metaphysico-theologo-cosmolonigology', and Voltaire's poem and letters tie his attack to Lisbon.
Debates and open questions
Pangloss caricatures Alexander Pope's popular 'whatever is, is right' as much as Leibniz's careful argument; how fair the satire was is debated.
▸Voltaire popularized The EnlightenmentWell documented
The connection
Voltaire was the movement's most famous voice, turning dense ideas into witty letters, plays, tales and pamphlets read across Europe. He brought Newton and Locke to French readers, campaigned against religious persecution, and corresponded with rulers such as Frederick the Great and Catherine the Great.
When and how
Paris; England (1726–28); Cirey with Émilie du Châtelet; Prussia (1750–53); and Ferney near Geneva (1759–78).
How we know
About 20,000 surviving letters and large print runs show his reach; his return to Paris in 1778, months before his death, drew huge public crowds.
Debates and open questions
Historians debate whether figures like Voltaire drove change or reflected it, and how far his ideas reached beyond educated elites.