Gotta agree with MrHaakwood. Just because the time was ripe for Hitler/Nazism, doesn't mean that such a philosophy was inevitable. I think it took the warped depravity of Hitler and his cronies to allow those who thought like him to come out of the woodwork. Get rid of the charismatic Hitler, and his cronies may not come to power, and those who think like them remain in the shadows. Plus, you have to remember that Hitler, at several occasions, said 'nein, I am not going to do what is rational'. Sometimes he pushed it and won. Ultimately he pushed it too far and lost. Get rid of Hitler, and you might have the usual state of affairs: leaders without the will to push it to the limit. Thus, WW2 could have a lot of causes, but it's not inevitable.