Abolitionist Movement
Northerners became frustrated with slavery. "Uncle Toms Cabin" exposed the treatment of slaves. It gets deep into how they were abused. John Brown raid also shows how the movement is growing. Also it shows how the movement is getting violent. People started feeling sorry for abolitionist and slaves.
Election of Lincoln
Southerners didn't like that Lincoln said that slavery could not expand to anymore states,but it could stay in the states its already in. Southerners also believed that Abraham was anti-slavery. The election of Lincoln was the last straw for a lot of Southerner. Lincoln stated that he wont take away slavery in the south. he just said no more trading.Lincoln was also elected without 1 Southerner state.