I would never argue that economics (of the rich, by the rich and for the rich) is not a driving force behind most wars.
The "War Between the States" is certainly no different in that respect.
The South had done a pretty effective job in DC protecting their "Peculiar Institution" while expanding it westward in the decades prior to the war.
Of course there were multiple reasons leading to the eventual conflict, but there has been a lot of revisionism in the last few decades that defies reality when it comes to the prime cause of the conflict.
Don't take my word for it. Here is the Confederacy's own Vice President, Alexander Stephens, addressing the subject on March 21, 1861 in Athens Georgia in what is now known as the "Cornerstone Speech":
Excellently written and sourced, sir.
- NanuqoftheNorth PIE'd this