I agree that some sort of civil war is possible, even likely at some point in the future. But I think the lines will be drawn with ideology, not geography. I stand more with the people on this forum than I ever would with the people who happen to live near me. I think one of the things that changed between the 1860s and now is that ideology back then was largely symmetrical with geography. Political issues such as slavery, taxes on manufacturing vs taxes on farming, and succession were issues important to people who lived in certain areas. These days, with so much inter-connectivity and mobility, issues bridge distances. A civil war of the 2000's will not be Michigan vs. Ohio or Arizona vs. California. It will probably be citizens of all 4 of those states who believe in A vs citizens of all 4 of those states who believe B.