I'll just summarize what I said in the topic similar to this one. It's pretty easy to say "Hey, slavery. Bad." or "Hey, crucifixion. Bad." when you don't bother to consider the alternatives. Look at the "white knights" of the NCR, all trumped up on ideas that their the successor of the former USA, clinging to the idea that through hard work and good ole fashion 'Merican-Know-How the immense damage done to the country will simply go away.
Well, there is no other way to say it. Kicking puppies is bad, stealing candy from children is bad, crucixion and slavery are bad.
This is an utter fallacy. I mean does anyone in their right mind really think they could pick up right where we left off after a catastrophic event on the level of a nuclear war? Even if a decent chunk of time has passed, attempting to build America up from it's smoldering ruins is insane.
Mr. House can rebuild New Vegas in just seven years. God knows what he can do in twenty.
If we're talking about rebuilding a free society you need to lay the ground work first. IE, beat the warring tribes into submission, erase their single-minded mentality.
Is this what the Legion does with its legionnaires? Erase their single-minded mentality? Legionnaires don't think for themselves, they follow orders. They're like trained dogs. Their mentality is as simple as cake.
Next put the kabash on Old World ideals of free thinking and rampant idealism; in the world of Fallout these things are useless. Once things have settled and what could pass as an "uneasy peace" sets upon the unified Legion, the natural progression of revolution, free thinking, and all that good stuff could occur. I realize the NCR does have some sound ideas and have conquered large swaths of territory, etc.
So, after everything the world loses pretty much all material stuff (factories, infrastructure, houses) it should just get rid of all immaterial stuff too? ''We lose our buildings, so we're just gonna start all over'' Mr. House just starts where humanitty left off, instead of letting the pre-war horrors occur all over again.