I'm pretty sure the UK would have already split if it was going to happen (allowed to). It will end up like Scotland wanting to bail and that was never going to happen. When the Queen says, 'It would be Bad' is not any different when the head of the KKK says, 'peaceful protest, . . or else'.
The South had slaves, the North had Company Towns, there is no difference. Perhaps the Slaves actually had it better as the Boss was in the field every day also. A wheat farmer never makes it to the Palace to have the Queen congratulate him for his service.