History records no phenomenon like him. Ought we to call him "great"? No one evoked so much rejoicing, hysteria, and expectation of salvation as he; no one so much hate. No one else produced, in a solitary course lasting only a few years, such incredible accelerations in the pace of history. No one else so changed the state of the world and left behind such a wake of ruins as he did. It took a coalition of almost all the world powers to wipe him from the face of the earth in a war lasting nearly six years, to kill him - to quote an army officer of the German resistance - "like a mad dog."
- From Hitler by Joachim C. Fest