Thomas Paine (January 29, 1737 (NS February 9, 1737) – June 8, 1809) was an English American author, pamphleteer, radical, inventor, intellectual, revolutionary, and one of the Founding Fathers of the United States. He has been called "a corsetmaker by trade, a journalist by profession, and a propagandist by inclination."

Born in Thetford, in the English county of Norfolk, Paine immigrated to the British American colonies in 1774 in time to participate in the American Revolution. His principal contributions were the powerful, widely read pamphlet Common Sense (1776), the all-time best-selling American book that advocated colonial America's independence from the Kingdom of Great Britain, and The American Crisis (1776–1783), a pro-revolutionary pamphlet series. "Common Sense" was so influential that John Adams said, "Without the pen of the author of 'Common Sense,' the sword of Washington would have been raised in vain.”

Paine lived in France for most of the 1790s, becoming deeply involved in the French Revolution. He wrote the Rights of Man (1791), in part a defense of the French Revolution against its critics. His attacks on British writer Edmund Burke led to a trial and conviction in absentia for the crime of seditious libel. Despite not speaking French, he was elected to the French National Convention in 1792. The Girondists regarded him as an ally, so, the Montagnards, especially Robespierre, regarded him as an enemy. In December of 1793, he was arrested and imprisoned in Paris, then released in 1794. He became notorious because of The Age of Reason (1793–94), his book that advocates deism, promotes reason and freethinking, argues against institutionalized religion and Christian doctrines. He also wrote the pamphlet Agrarian Justice (1795), discussing the origins of property, and introduced the concept of a guaranteed minimum income.

In 1802 he returned to America where he died on June 8, 1809. Only six people attended his funeral as he had been ostracized for his ridicule of Christianity.