In the cancelled Fallout movie's treatment, they hint at Vault-Tec being the ones who basically pushed humanity into the Great War to test their experiments and to fulfil Vault-Tec's CEO's prophecy of nuclear war. I began thinking last night about the Vault-Tec Rep's dialogue with you when you reserve your space in Vault 111, and it seems as though he's extremely nervous. It's as if he knew the war was coming that day, or at least really soon. If that's the case, he had to have heard it from somewhere.
If Vault-Tec had inside information on the impending apocalypse, then that could either confirm that they were involved in launching the nukes or that they had gained that information from somewhere, likely the US government or maybe a privately-funded spy organization operating in China? I suppose it's entirely possible that they just speculated the war was impending because of global events, but it almost feels like Bethesda was (intentionally or not) confirming at least one part of the movie treatment as canon. We all knew that Vault-Tec was demented but if their CEO actually did start the war to test their experiments and fulfil his prophecy, then Vault-Tec is now on a whole new level of evil. It also would help to clear up one of the last mysteries of the actual war itself, being that we all know now when the Great War began.
As I said, it's likely this is all coincidence, and the Vault-Tec rep was just told to say what he said or speculated the war was near based upon global affairs, but it would be interesting if Vault-Tec really was behind the war. What do you guys think?