You say that with the certainty of someone who knows the absolute truth rather than as someone who has to piece it together from what information can be found.
I always mark certainty as a sign that people aren't being objective. Indeed, some people don't even know how to be objective.
Southerners were heavily involved in the cotton factorage system. Families got rich off shipping.
No doubt this is true, but does not disprove the point that New Yorkers were getting even richer while contributing less than the producers.
New Orleans will full of shipbuilders.
Not the oceangoing cargo ships. Riverboats and perhaps packet ships, but nothing that directly traded with the dominant trade partners. They built only ships that left New York dominating control of the trade.
Obviously you didn’t read my earlier post. New Orleans shipbuilders built hundreds of ships for the coastal trade that you claim was completely run by the north.