François-Marie Arouet, known by his nom de plume Voltaire, was a towering figure of the French Enlightenment, a period characterized by an explosion of ideas concerning philosophy, politics, and human rights. Born on November 21, 1694, in Paris, Voltaire was renowned for his wit, his criticism of Christianity, especially the Roman Catholic Church, and his advocacy of freedom of speech, separation of church and state, and civil liberties. He was a prolific writer, producing works in almost every literary form including plays, poetry, novels, essays, historical and scientific works, as well as more than 20,000 letters and more than 2,000 books and pamphlets. Voltaire's 'Treatise on Tolerance' is a seminal work that reflects his intellect and commitment to advocating for religious tolerance and rational thought. The book itself was a response to the notorious case of Jean Calas, a Protestant wrongfully executed for the supposed murder of his son. Through this and other texts, Voltaire's literary style often encompassed sarcasm and wit, alongside a passionate plea for enlightenment principles and humanitarian justice. His influence extends beyond his lifetime, with his works and ideas leaving an enduring legacy on both the French and global stages of literature and human rights advocacy.