And you can't point to anything from the constitutional convention or the debates of ratification that any of the authors or any of the opponents of the constitution say what was intended was anything other than a perpetual union. The Articles of Confederation were specifically intended and described in that document to be a perpetual union of states, and the Constitution was specifically noted in the preamble to be for the intention of forming a "more perfect union" that was possible under the Articles of Confederation. You would have us believe that while both the Federalists and the anti-Federalists were remarkable in their insights and anticipation of future legal conflicts involving constitutional law, but somehow the idea of secession seemed to escape all of their attention? Not a word of a right to secession was mentioned in any of those debates. That is because they all knew and understood perfectly that it was a perpetual contract. The only conceivable way out was through amendment or a new convention, which the south never even attempted.