On the other hand apparently the Supreme Court disagrees with me [1], and only 33% of people polled think that Texas can secede [2].
[1] http://blog.constitutioncenter.org/2012/11/constitution-chec...
http://www.wnd.com/2012/11/secession-its-constitutional/
It's not because there was the Civil War that the Civil War outcome was Lawful. The Southern States had the right to secede and that right was not recognized by Lincoln.
> We must, indeed, all hang together, or assuredly we shall all hang separately.
- Benjamin Franklin
Sedition was a common law offense, and treason was defined as an affront to the monarch. Either would have sent most of the signers to the gallows.
See http://en.wikipedia.org/wiki/George_III_of_the_United_Kingdo...
" He has excited domestic insurrections amongst us, and has endeavoured to bring on the inhabitants of our frontiers, the merciless Indian Savages, whose known rule of warfare, is an undistinguished destruction of all ages, sexes and conditions."
Britain wasn't allowing the colonies to expand westward, and the Patriots were pissed.
Notice the years this war was waged. The British were definitely not cool with the American colony seceding.