What happens when a president convinces the world he might just do the unthinkable? In US grand strategy and the Madman Theory, James D. Boys argues that projecting calculated irrationality can terrify adversaries into submission, but at enormous risk. From Nixon's secret Cold War gambit to Trump's chaotic, tweet-driven diplomacy, he explores how these two leaders weaponised unpredictability to keep allies guessing and enemies off balance. But where does strategy end and ma...