Summary: The secession of South Carolina was the start of the Confederacy. Since South Carolina was the first to secede to the Confederacy the state knew that soon more southern states will follow since Abraham Lincoln was elected president and he would abolish slavery is they were to stay with the Union.
Northern Perspective: The north did not like the fact that the southern states seceded from the Union because it would be harder for them to abolish slavery. Also the whole plan was to have one whole nation who did not have any form of slavery.
Southern Perspective: The south was somewhat relieved that they were able to get away from the union and they would still be able to have slaves. The southern states also realised that it would be much more difficult to perform tasks since the north had a majority of the railroads, factories, and farmland.