[_5ysi]

My previous reply is being down voted a lot so I'll try again and compare them.

These tariffs were effectively a tax on slavery and a redistribution of income from agriculturalists in the south to industrialists in the north. The major cause of the South's succession may have been slavery, but the immediate cause can still be these taxes which were putative to slavery. They didn't suceed in response to the emancipation proclamation.