Well OK here it is in a nutshell...
I would have fought for the South, since I'm Suthrun and whatnot, but I think the North HAD to win in order for this country to advance economically...
To the latter question, his answer appears to be, "in the short run, yes, they could have -- but in the long run, either 'no', or 'it wouldn't have made any difference'." I think that's what he said. He will correct me if I've muffed it.