That the US can wage small wars abroad without impacting its domestic capital production and labor bases much at all is due largely to asymmetry of forces, econ

That the US can wage small wars abroad without impacting its domestic capital production and labor bases much at all is due largely to asymmetry of forces, economies, and of course distance. Another American civil war that isn't just brief and minor discretionary intervention by the Nat'l Guard (as in the LA riots or Katrina)–which is an awfully poor definition of civil war–but rather is more like 1861-1865, would significantly impact domestic quality of life. In fact, I'd wager the American middle-ground between the small regional events it's experienced in recent history and total chaos is small, if it exists at all. Which is probably what will keep it from happening, so long as most people are reasonably prosperous, which is likely to be the case, assuming it deals gracefully with the rapidly dwindling lower middle class and the rapid consolidation of production (a non-trivial assumption).