In 1754 Warren married his second cousin Mercy Otis Warren, who like him was also descended from Edward Doty. The couple had five sons: James, Winslow, Charles, Henry, and George. Mercy Warren was the daughter of James Otis Sr. and sister of Warren's firebrand lawyer friend James Otis Jr., as well as a historian, poet and playwright. She hosted political meetings in their home, and also became known for her correspondence, including with Abigail Adams, John Adams and Catherine Macauley. With her husband's support Mercy Warren, published at least two political plays, The Adulateur and The after the war, a volume of poetry and History of the American Revolution''.
Political career
A farmer and merchant as well as trained as a lawyer, Warren became an outspoken critic of British governmental policies following the Stamp Act of 1765. He began a twelve-year term in the lower house of the Massachusetts General Court in 1766, and was elected its speaker in 1775. Following the colony's break from Britain, in 1776 Warren was elected a member of the Provincial Congress. A member of the Sons of Liberty, Warren worked closely with his father-in-law and brother-in-law, and with Samuel and John Adams. Warren was more prominent in the early days of the Revolution than in the war itself. He fought in the Battle of Bunker Hill, and after Dr. Joseph Warren died in that engagement, succeeded him as President of the Provisional Congress. Warren also served as Paymaster General of the Continental Army from 1776, and on the Naval Board. He thus worked closely with George Washington throughout the conflict. Commissioned a major general in the Massachusetts militia over his wife's opposition, Warren refused to serve under Continental Army officers of lesser rank whom he had worked with as Paymaster General. Claiming illness, he refused to accept command in Rhode Island, then resigned his state commission in 1777. His duties within mostly British-occupied Massachusetts meant Warren took no part in battles after military action moved away from Boston. However, his son U.S. Navy Lieutenant James Warren Jr. lost a leg in a naval engagement. Another son, Lieutenant Winslow Warren died in the Battle of the Wabash in the Northwest Territory, the greatest defeat of the U.S. Army by Native Americans in the United States and part of the Northwest Indian War. He was a charter member of the American Academy of Arts and Sciences. After the Revolutionary War, Warren became controversial as an Anti-Federalist, opposing the new Constitution. Both he and Mercy submitted essays to the local newspaper as "Helvitius Priscus". Mercy Warren also wrote a pamphlet under the pen-name "A Columbian Patriot". However, their political stance put them at odds with some of Boston's mercantile elite, including Governor John Hancock, and his former ally Samuel Adams.
Death and legacy
James Warren is buried on Burial Hill in Plymouth, Massachusetts, as is his wife. Their son Lieutenant Winslow Warren, is buried in Ohio. Other sons became distinguished doctors, lawyers and merchants in Boston. Their great-great grandson, Charles Warren became a distinguished lawyer and historian.
