In this week's Book Club podcast I'm joined by Ferdinand Mount who in his long career has been literary and political editor of this very magazine, as well as editor of the TLS and head of Margaret Thatcher's Number Ten policy unit. We discuss his new book Big Caesars and Little Caesars: How They Rise and How they Fall, from Julius Caesar to Boris Johnson. He tells me why he thinks it's fair to compare our recent former prime minister with a cast of despots and autocrats from Indira Gandhi and Oliver Cromwell to Louis Napoleon and even Adolf Hitler, and why he sees the impulse to autocracy as an ineradicable thread in human history.