What would be the possible negatives associated with a significant withdrawal from the world by the USA? I'm not proposing this, I'm pondering it, but imagine the following happened, what would be some downsides?
1. Withdrawal from every military alliance in which the US participates, including NATO.
2. Withdrawal of troops based in South Korea/Okinawa, plus Europe/ME/wherever.
3. Cut military budget by "half". Maybe retain 10 AC carriers to be based on US territory, the nuclear "deterrent", subs, smaller Army and Marine Corps and Air Force.
4. Cut foreign aid to near zero.
5. Withdraw from the UN, or perhaps remain for show, but don't pay the bills. Maybe ask them to move out of NYC.