The institution of slavery was the largest factor in helping to spark the Civil War. The institution of slavery and its existence has caused significant problems between Northerners and Southerners, especially as the United States grew. Fighting over whether or not new territories/states would have slavery caused a serious of failed compromises like the Missouri Compromise, the Compromise of 1850, and the Kansas-Nebraska Act. This continually fighting over slavery and its existence was what sparked the state of South Carolina to secede from the Union after the election of president Abraham Lincoln.
Dual federalism is a political system where the responsibilities and powers of the federal government and the state governments are distinctly separated. In the cooperative federalism, the line of distinction between the powers and responsibilities of the national government and the state governments is blurred.