Sorry, but the North was nearly bankrupt and hit was heavily over-leveraged, i.e. it had a lot of debt. The South had poduction and exportation, the North's exportaion dwindled and with the use of their fiat paper dept incured.
As people can find out if they realy desire to look, slavery was ending. But it doesn't make as good of a story as the lie; because the lie is what has been sold for many years as the reason for murdering 600,000 plus people. If people realy knew it was to confiscate the wealth of the South, they may feel a bit different about Lincoln and the un-Civil War.