"Don't invade fellow democracies". Business doesn't like things like wars of conquest where the legal system your factories operate under, your workers and the

"Don't invade fellow democracies". Business doesn't like things like wars of conquest where the legal system your factories operate under, your workers and the factories all seized by force or blown up when someone artillery strikes the town they're in to the ground. The whole point of being a reserve currency is to be stable and a key part of that is also enforcing stability - which the US does through things like it's naval supremacy. "Don't invade fellow democracies" is a pretty easy set of rules to play by, and is appealing to every country which would like not to be invaded - which is to say, economically doing business with the US is a very good deal if it means the US has your back if someone does look like they want to invade you. This entire concept is one of the ideas currently being used to try and keep China in check, and it was presumed in Europe that this was what would keep Russia in check (and the failure of that assumption is now the cause of the huge uptick in orders for US military equipment - so even there, the US is doing well out of the policy).