My guest on this week's Book Club podcast is the American writer, reporter and foreign policy expert Robert Kaplan, whose new book The Tragic Mind: Fear, Fate and the Burden of Power argues that it's in Greek tragedy that we can find the most important lessons in how to navigate the 21st century. He tells me how the reflections in the book arose from his remorse at having influenced the Bush administration with his support for the Iraq War, why it still makes sense to think about 'fate' in a world without gods and why George H W Bush was a paragon of the tragic mindset while his son George W Bush was a tragic hero.