America is, politically, the oldest society on the planet -- every other country has changed political systems more recently. Thus it is like a very old person who still foolishly thinks of themselves as a young rebel.
If I had to characterize America as a single person it would be an 80 year old in a cowboy hat, touchy and armed but not with a gun (he can't see well enough to hit anything), with a grenade launcher. Whenever he gets angry or scared, he fires grenades at groups of people.