It is of course only quite resonantly that Muggles have gained enough firepower to be a threat to shielded wizards.
It is mentioned that Grindelwald confunded Neville Chamberlain, and that the Nazis were his "muggle pawns". So I think its probable that "Imperious a few heads of state" has already happened and the result was WWII.
McGonagall would probably want to use a different method that didn't involve unforgivable curses though.
This is a new thread to discuss Eliezer Yudkowsky’s Harry Potter and the Methods of Rationality and anything related to it. This thread is intended for discussing chapter 112.
There is a site dedicated to the story at hpmor.com, which is now the place to go to find the authors notes and all sorts of other goodies. AdeleneDawner has kept an archive of Author’s Notes. (This goes up to the notes for chapter 76, and is now not updating. The authors notes from chapter 77 onwards are on hpmor.com.)
Spoiler Warning: this thread is full of spoilers. With few exceptions, spoilers for MOR and canon are fair game to post, without warning or rot13. More specifically: