“So you’re the little lady who started this great war!” said President Abraham Lincoln in the fall of 1862 when he finally met Harriet Beecher Stowe, the author of the blockbuster antislavery novel Uncle Tom’s Cabin. But Lincoln might just well have been talking to and about Harriet Tubman, the most famous conductor on America’s underground Railroad. Both women’s extraordinary activism advanced the fight against slavery and edged this country closer to Civil War.