I wish the world world the way you say it should. But until then ... the US really keeps a lot of things from happening.
That said ... understand I'm an Isolationist Libertarian. I want to pull back to the Americas. In fact, given how most of our allies are pissed at us now, I think it's going happen anyway. Japan alone is severely pissed with the Obama administration on FoN, and basically forced the President to restart them ... although now it's too late.
Hitler wanted to expand Germany for both economic and genocidal reasons. Hubris on both sides that lead to war.
Yes ... and yet people thought they could stop it from happening by giving him the most well defended, well armed, highly industrial, northern areas of Czech lands.
How well did that work out?
There were other solutions to the Great Depression that Germans should have explored, but they went with the emotional vote.
Many would argue the Germans would still today, but really haven't been their own nation for awhile.
Much like I'm afraid the Republican base is doing behind Trump.
Most Republicans cannot stand Trump. He only has 1/4th of them, and even the Republican focus groups have pointed out why.
If you read Trump's actual policies, they aren't what he says in front of the camera. He just is anti-PC for free advertising reasons, and he's spent the least, by far ... of anyone. They like him being anti-PC, to inspire real debate.
That's what virtually every focus group that studies Trump's supporters are pointing out. The fact that he's anti-PC is finally "breaking through" the media non-sense. I.e., much of the media counters Trump, and
also end up being wrong too.
I.e., From there, people get educated on the actual civics.
SIDE NOTE: Trump has traditionally been a Clinton-Democrat, but with a twist. When it serves his business interests, he's pro-Clinton (e.g., eminent domain). But when it doesn't, he's not (e.g., H1B "indentured servitude"). E.g., He's actually more like Bernie Sanders on immigration (bomb the Visa system, issue more Green Cards, let people become immigrants), very different than "Big Business" Bush and Clinton.
Even left-leaning The Atlantic and Salon have been trying to warn Democratic voters what is coming. That while Trump will probably not win, let alone probably won't get the GOP nomination (and even if he does, they'll pull a "Ron Paul" type fiasco to keep him from getting it), it's part of the greater "anti-PC" movement that appeals not to a growing number of just Republican voters ...
But even Democratic ones too that are tired of hiring things in the media that seem true, but are not.
If you don't view the other side as a threat, there's no need for deterrence.
I won't argue the French greatly influenced the creation of Nazi Germany because they saw them as a threat.
But how much were the Czechs responsible for that? And why did we give into Hitler's demand for those key, Czech defensive positions and their prime, industrial base? Why? Why, why, why?
Just like the President has been doing, and now reversing (because he sees the grave errors of doing so), with the Chinese and Russians?