And again, you don't get it - I've already - and will repeat - said, the South has no moral standing here. Chattel slavery was/is a great evil. And again, at the time, the South had 4 of the 5 best theologians in all of the US and yet, they utterly failed in leading the Church in the South to abolish the practice, confess the sin, repent, and make restitution. We had no Newton and Wilberforce. That's a huge plank! There's no need to take your dare. Not covering a plank in the least.
My point, once again, is that in great part, the capital necessary to fuel industrialization in the North (especially in NE) which gave it both technical advantage over the South and made slavery on a larger scale less attractive (as did the inability to do large scale farming on Northern soil), was nevertheless raised through the heinous practices of NE shippers in their triangular shipping trade.