Adolf Hitler and Winston Churchill. Two rulers who stood in power in two very different states. The era of the reign of each of them - no matter how it is assessed - played a decisive role in the further development of Germany and Great Britain - two irreconcilable opponents in the Second World War. Who were these personalities? What were their methods of government? What role did they play in the history of their countries and the world as a whole? Using the example of two of the most famous leaders of the twentieth century, British historian Andrew Roberts examines the problem of leadership as a phenomenon of world history.