François-Marie Arouet (French: [fʁɑ̃swa maʁi aʁwɛ]; 21 November 1694 – 30 May 1778), known by his nom de plume Voltaire (/vɒlˈtɛər, voʊlˈ-/;[5][6][7] also US: /vɔːlˈ-/,[8][9] French: [vɔltɛːʁ]), was a French Enlightenment writer, historian, and philosopher famous for his wit, his criticism of Christianity, especially the Roman Catholic Church, as well as his advocacy of freedom of speech, freedom of religion, and separation of church and state.

Voltaire was a versatile and prolific writer, producing works in almost every literary form, including plays, poems, novels, essays, and historical and scientific works. He wrote more than 20,000 letters and more than 2,000 books and pamphlets.[10] He was an outspoken advocate of civil liberties, despite the risk this placed him in under the strict censorship laws of the time. As a satirical polemicist, he frequently made use of his works to criticize intolerance, religious dogma, and the French institutions of his day.

The author adopted the name Voltaire in 1718, following his incarceration at the Bastille. Its origin is unclear. It is an anagram of AROVET LI, the Latinized spelling of his surname, Arouet, and the initial letters of le jeune (“the young”).[27] According to a family tradition among the descendants of his sister, he was known as le petit volontaire (“determined little thing”) as a child, and he resurrected a variant of the name in his adult life.[28] The name also reverses the syllables of Airvault, his family’s home town in the Poitou region.[29]