Adolf Hitler was an unlikely leader but he still formed a connection with millions of German people, generating a level of charismatic attraction that was almost without parallel. It is a stark warning for the modern day, says historian Laurence Rees.
At the heart of the story of Adolf Hitler is one gigantic, mysterious question: how was it possible that a character as strange and personally inadequate as Hitler ever gained power in a sophisticated country at the heart of Europe, and was then loved by millions of people?
The answer to this vital question is to be found not just in the historical circumstances of the time - in particular the defeat of Germany in World War I and the depression of the early 1930s - but in the nature of Hitler's leadership.
It's this aspect of the story that makes this history particularly relevant to our lives today.