What is the theme in Hitler by Ian Kershaw?

Hitler's motivations make up the central theme of the book. Adolf Hitler is a man who is not well-educated. There is little in his background that marks him as especially anti-Semitic or reactionary. He spends years as a bohemian artist who is in and out of homeless shelters. Then he becomes a front-line soldier and survives World War I. Hitler seizes on the populist myths of his time in post-World War I Germany. The military wants to blame someone else for the defeat of Germany. They are threatened by active revolutionary movements, some of them Democratic and others Communists.