Thats a lot of "what if's" but nothing about "what is." We cant go back and change the past. Somehow thinking that we can retreat into bubble and disregard the world around us is unrealistic. For centuries the only thing guaranteed by man is power, greed, war and taxes. No matter how man evolves in a society there is always someone else who will want more power, etc and will take it at any costs. So by living in a bubble we will insulate ourselves from those that have such ideology? When has that ever worked? There were those that chose the route of appeasement under Hitler, only find the Nazi boot to their necks as a result. What if those that predicted such aggression actually did something as preemption strategy rather a reactive? The writing was on the wall for years that he was amassing a massive army and many feared what eventually happen. Only it turned out to be far worse then they could have ever imagined.
Example of what im talking about:
72 Years Ago Great Britain Decided to Let Jews To Die In The Holocaust
Seventy years ago this week, the British Parliament decided to abandon doing the "right thing." With tacit agreement from the United States, they decided to appease Arabs terrorizing Jewish civilians. Who knows how many hundreds of thousands of Jews could have escaped the Holocaust if they were able to escape to the Holy Land.