Abolitionist leaders like William Lloyd Garrison, Fredrick Douglass, Harriet Tubman, Harriet Beecher Stowe, John Brown, and Sojourner Truth worked to end slavery and contributed to rising tensions between the North and South. Fredrick Douglass escaped slavery and became a writer and editor of an anti-slavery newspaper. Harriet Tubman helped over 300 slaves escape to freedom using the Underground Railroad. John Brown believed in using force against slavery and was hanged for raiding a federal arsenal. Harriet Beecher Stowe's novel Uncle Tom's Cabin increased opposition to slavery across the North.