What need has anyone to explain it? If the 13 states had a right to secede from the United Kingdom for whatever reasons they saw fit, then so too did the Southern states have a right to secede for whatever reasons they saw fit.
Having the right to leave does not require any justification to assert that right.
32 posted on 08/29/2019 8:57:29 AM PDT by DiogenesLamp
("of parents owing allegiance to no oither sovereignty.")