Y’all are dancing in the dark. Getting close, but no gold stars.
The definitive interpretation is in the several books by Charles and Mary Beard, who forced the North to rethink its’ “slavery was the only cause” catechism in 1921. Yes, Secession was driven largely by tariff and economic issues related to the market for cotton, but the whole of it is much too complex for a blog post. The Beards’ books are still in print, on Amazon (or Alibris if you prefer).
Beard series of books are excellent. Reality of economic drivers and... greed. All true.
Should be noted that the financial sectors of Philadelphia, NYC and even Boston— who made millions- all supported the South, from generations of business arrangements which, until the Industrial Revolution were enormously profitable.