If Civil War started in the United States - Would you fight, and for what?

I have read several stories and news articles about the United states breaking out into civil unrest resulting in a civil war. If this were to happen what do you belive would cause such unrest and how would it evolve into a civil war?

Please give feed back as to what you belive would cause this, and what side would you take? Who would you fight against? What would cause our entire country fall into a civil war?