Radio War Nerd did a good Civil War series in which they dispelled a lot myths that a lot of prominent historians still talk about as if they were true. One of them was the extent to which the Northern bourgeoisie was essentially in cahoots with the South because the primarily northern industry was textile manufacturing, and how they essentially tried to prevent a Union victory for a long time. I remember John Dolan saying that a number of northern bourgeois and early Union generals should have been hung for treason.