The Harriet Beecher Stowe is the one that that wrote "Uncle Tom's Cabin." during the Civil war, and the women who Abraham Lincoln said to her "So this is the little old lady who started this war" as in the Civil war that is.
Harriet Beecher Stowe is famous because she wrote Uncle Tom's Cabin, which was an abolitionist novel. This novel blamed the entire nation for slavery. It was not an anti-southern book. It did not cause the US Civil War. The book was published about ten years before the US Civil War.
Harriet Beecher Stowe wrote a book about life in slavery, Uncle Tom's Cabin or, Life Among the Lowly which was published in 1852. It immediately fueled the Abolitionist movement and, has been cited as being one the root causes of the Civil War.