If you believe there is evidence that secession would have produced no negative economic effect on the Northern power brokers, offer it up for us to consider.
You can't accuse me of cherry picking when the only available evidence all falls into the same category. They can't all be cherries.
Of course having a bunch of states ripped from the Union was going to chase economic problems. I’m pretty sure having Germany take over Poland put a ding in Poland’s economic outlook. But Hitler never said “What about my revenue?”
Again, my laser focus is on Southern secession, and your Neo-Confederate mythology of the Lost Cause.
To recap:
The reason for secession was the South’s desire to preserve slavery.
The trigger for secession was the election of Abraham Lincoln, which fed fear of the abolitionist foundation of the Republican Party.
The American Civil War began when units of the South Carolina Militia fired upon a Union fort in Charleston harbor.