Architect of the century’s defining episode of terror, the holocaust, Adolf Hitler’s dream of a world dominated by a Teutonic master race led to the systematic slaughter of six million Jews, together with gypsies, Slavs, homosexuals, Communists, and other “undesirables” in the death camps. Europe talked peace when he seized the Rhineland and Czechoslovakia – not until his invasion of Poland in 1939 did Britain and France declare war