François-Marie Arouet (French: [fʁɑ̃swa maʁi aʁwɛ]; 21 November 1694 – 30 May 1778) was a French Enlightenment writer, historian, and philosopher. Known by his nom de plume M. de Voltaire (/vɒlˈtɛər, voʊl-/; also US: /vɔːl-/; French: [vɔltɛːʁ]), he was famous for his wit, and his criticism of Christianity—especially of the Roman Catholic Church—and of slavery. Voltaire was an advocate of freedom of speech, freedom of religion, and separation of church and state.