Dictators explained

Historian Frank Dikötter discusses his new book How to Be a Dictator, which explores the malevolent careers of eight 20th-century rulers including Adolf Hitler, Stalin, Mao and Mussolini.

• Rise of a dictator: how did Hitler gain power and become the führer of Germany?
• A dictator’s death: how Stalin, Hitler, Mao and other self-styled strongmen met their ends