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Cotton Mather, (born February 12, 1663, Boston, Massachusetts Bay Colony [U.S.]—died February 13, 1728, Boston), American Congregational minister and author, a supporter of the old order of the ruling clergy, who became the most celebrated of all New England Puritans. He combined a mystical strain (he believed in the existence of witchcraft) with a modern scientific interest (he supported smallpox inoculation). The son of Increase Mather and the grandson of John Cotton and Richard Mather, Cotton Mather lived all his life in Boston. At 18 he received his M.A. degree from the hands of his father, who was president of the college.