Freddy Gray speaks to James D. Boys, author of the new book US grand strategy and the madman theory. He is also a senior research fellow at UCL. They discuss the origins of the madman theory – which applies insights from psychology to understand how your enemies think. James covers it from from Nixon to Trump and its intellectual home in Boston. They also explore how the madman theory is being applied in the Middle East conflict and how regularly the theory can be misapplied.