Adam Kirsch in the New York Times:
When Adolf Hitler turned 30, in 1919, his life was more than half over, yet he had made not the slightest mark on the world. He had no close friends and was probably still a virgin. As a young man, he had dreamed of being a painter or an architect, but he was rejected twice from Vienna’s Academy of Fine Arts. He had never held a job; during his years in the Austrian capital before World War I, he survived by peddling his paintings and postcards, and was sometimes homeless. When war broke out in 1914, he entered the German Army as a private, and when the war ended four years later, he was still a private. He was never promoted, the regimental adjutant explained, because he “lacked leadership qualities.”
Yet within a few years, large crowds of Nazi supporters would be hailing this anonymous failure as their Führer. At 43, Hitler became the chancellor of Germany, and by 52 he could claim to be the most powerful man in the history of Europe, with an empire that spanned the continent. In the sheer unlikely speed of his rise — and then of his catastrophic fall — Hitler was a phenomenon with few precedents in world history.
More here.