Whose abolitionist novel, published in 1852, “started this big war”?

Stowe

Explanation:

The novel called Uncle Tom's Cabin; or, Life Among the Lowly is said to have helped lay the groundwork for the Civil War. The Novel is an anti-slavery piece by an American author called Harriet Beecher Stowe. The novel, published in 1852, seems to have caused a profound effect on how people acted  toward African Americans and slavery in the United States of America.

Hope this helps

theodore roosevelt challenged william to a duel, whoever won, got their policy sent to congress. it ended up in a stalemate, and both men were injured and sent to the hospital.