Flawed Strategy: Why Smart Leaders Make Bad Decisions

Why did Volodymyr Zelensky doubt that Russia was preparing a full-scale invasion of Ukraine in 2022? Why did British Prime Minister Neville Chamberlain decide to 'do business with Herr Hitler' in Munich in 1938? And how was it that Israeli elites dismissed intelligence warnings of the Hamas attack in 2023? Had they not learned their lesson from the Egyptian‒Syrian attack on Yom Kippur fifty years earlier?

In all these cases, smart decision makers misjudged their adversaries, largely because...