[BroJoeK]

DiogenesLamp: "The very foundation of what created New England wealth would have collapsed.
No, this was about perhaps as much as 80% of the entire Eastern Seaboard economy, it wasn't about just cotton or tariffs.
It was about the big enchilada.
Southern Dominance of European trade."

Sorry, FRiend, but actual numbers & events don't support your wildest fantasies.
First of all, you need to remember that the majority of US cotton in 1860 was grown in the Deep South Gulf Coast states, not along the Eastern Seaboard.
As such, more cotton shipped internationally from New Orleans than anywhere else -- half the entire US cotton exports shipped from New Orleans.

Of cotton exports from New Orleans, 50% went to Britain, 20% to France, 15% to other European customers (that's 85% total) with just 15% going to Northern US customers.

So, your notion that Northerners were in sole control of Southern production is just mistaken.
Southerners shipped their produce wherever and whenever they chose.
And those who did use Northern ports could well insist they receive the same returns as those who shipped directly from New Orleans.

Note below that most cotton was produced near & shipped from, New Orleans and 85% of that to international markets:

[DiogenesLamp]

Are you slow? My point has nothing to do with Cotton. It has to do with wrecking New England trade.

I'm not sure how to get the point across to you. Eliminate Cotton and Slavery all together, and what remains is the fact that an Independent South was a grave threat to North Eastern financial interests.

Taking trade away from New York, Boston, Philadelphia, and to a lesser extent Chicago, would have dealt a massive financial blow to the New England region.

Trade was New York's life blood.

What do you suppose would happen to the economy of New York if 80% of that New York pile was moved over to Charleston S.C. ?