But how do we get to 1861 and that secession crisis with Alexander H. Stephens delivering this Cornerstone Speech, declaring that, "Hey folks, it's all about slavery and its preservation?"
Bond markets, which have for 12 months tried to price the risk of a eurozone breakup, now have to calculate the possibility of the breakup of the Spanish state - for secession in Barcelona would surely prompt centrifugal tendencies in the Basque region, and exacerbate the fiscal crisis in the poorest regions.
The crisis is a direct result of both sides' failure to make progress in negotiations over post-secession security arrangements, citizenship rules and oil revenues, among other issues that should have been resolved long ago.