I don’t see enough support, organization and expertise for another civil war. What I do see is, on going low level violence that replicates the third world.
http://www.creators.com/opinion/pat-buchanan/is-belgium-breaking-up.html At some point, the US will a) become ungovernable, b) become despotic or c) coalesce around semi-autonomous regions. I believe it will be (c). Have a read.