To me the problem with what the world outside sees as US "adventuring" is that the US really believes they are doing these terrible acts for all the best reasons.

They really believe that Iraq, Afghanistan and all points beyond would really benefit from a US style democracy, without even contemplating that that may not actually be the solution that those countries want or need.

They really believe that a US style democracy is the only way for these people, even to the point of demonstrating that it is worth blasting the shit out of them in order to impose it.

Doesn't anyone in power even start to think that perhaps they might be just a little bit wrong? Do they really believe these short-term imposed "solutions" will ever last?

As to world domination, if you make as many enemies as the US has done by their heavy-handed tactics over the last 40 odd years, world domination is the only route left for survival.

cheers, Terry