Jefferson warned of “foreign entanglements”.
Eisenhower warned of the “military industrial complex”.
This is not new.
Here’s an exercise which I’ve done recently: bring up google maps and scroll out to a regional view. Surf around our globe and ask yourself if there is tension or unrest or outright war in the area your mouse happens to be over.
If you are well-informed you will find that there is tension almost everywhere. Conflict seems to be the norm; tranquility and living harmoniously with one’s neighbors the exception.
I think it is good to keep in mind that nice as it would be, we are pretty far from the world of John Lennon’s song.