>i agree that globalization would reduce the risk of global conflict - there would only be one side. thus, if the wrong people were in power there would be no way to fight them. that's scary.

That's not scary, that's the US. The Federal government functions more successfully than state governments in every way. In the Fed we have Trump vs. in states we have literal coups and gerrymandering. The US is better as a federation than individual states in every way. A state is not more able to fight "the wrong people being in charge", but they are significantly more vulnerable to it.