Well the armament industry is in the top industries in the USA at $176 billion a year
Their foreign policy has always been on the basis of "You will do what I tell you to do"
Many of their wars are about "trade"
But they do do a lot of good, purely from the point of world policeman, a role that the UN should be doing but they are a waste of space, and have never achieved anything of consequence, so if not the US , then chaos will rein