South Carolina was the first state to secede from the Union on December 20, 1860. Because they were the first to leave they needed to explain to the rest of the states and the world why they were dissolving the Union and defend the legality of secession. South Carolina's declaration of secession includes a defense of states' rights as the foundation for the legality of secession as well as the grievances with the North that sparked that action.
Read the other secession documents here:
Dr. Kathleen Logothetis Thompson graduated with her Ph.D. from West Virginia University in 2017. She earned her M.A. from West Virginia University in 2012 and her B.A. in history with a Certificate in Revolutionary Era Studies from Siena College in 2010. In addition, Kathleen was a seasonal interpreter at Fredericksburg & Spotsylvania National Military Park from 2010-2014 and has worked on various other publications and projects.