By clinging to American primacy through force and intimidation, Donald Trump is, ironically, undermining US global power. A saboteur trying to subvert US interests from the inside could hardly do better than what he’s accomplished through sheer incompetence.
Because the US isn’t at a full on tipping point on that yet, because yes, that’s when civil wars start.
US Civil War #1 started over a military base. If POTUS declares and attack on a major ally, that’s probably going to be the starting gun for the second one.
The U.S. Civil War #1 never really ended (confederate flags all over the South, institutionalized racism, legal slavery in for-profit prisons, etc.), it just went into a “cold” phase. It is certainly heating up again.
I agree with this as someone who grew up an hour away from Harrison Arkansas, but I say #1 just because historically the hot war does have defined dates.