The Civil War was caused by economic and social differences between the North and South, conflicts over the expansion of slavery into new territories, and the growth of the abolitionist movement. The election of Abraham Lincoln, who opposed the expansion of slavery, led Southern states to secede from the Union. Key differences between the North and South included their views on slavery, states' rights, and the economies of industry in the North versus plantations and agriculture in the South. Abolitionists like John Brown, Harriet Beecher Stowe, Frederick Douglass, Levi Coffin, and Susan B. Anthony worked to end slavery through peaceful and violent means.