[The_Media_never_lie]

Sad and tragic loss of life, brought about by the evils of slavery, Northern intransigence and Southern hardheadedness.

[Huck]

Brought about by the consolidation of power created by the Constitution. Had we remained a confederation, the slavers would have had nothing to fear, and the abolitionists would have had no power to harass them.

[central_va]

Northern intransigence and Southern hardheadedness.

Brought about by Northern taxation, tariffs and hypocrisy:

"My paramount object in this struggle is to save the Union, and is not either to save or to destroy slavery. If I could save the Union without freeing any slave I would do it, and if I could save it by freeing all the slaves I would do it; and if I could save it by freeing some and leaving others alone I would also do that."

              -- The "Illinois Butcher™"

Without the South, the USA would be a Socialist Marxist Country by now.

[manc]

take it you don’t know what Lincoln said about slavery then and why he went to war, psstt it was not slavery... a little speech about preserving the union and not freeing slaves.
I’ll let you search it through Bing etc