Why did the United States, despite vigorous public debates over the wisdom of invading Iraq, pursue an ultimately disastrous war with Iraq in 2003? After all, as John Stuart Mill and others have suggested, such debates in the ‘marketplace of ideas’ should surely have led to a solid consensus against such a course. Explaining why American foreign policymakers repeatedly commit such mistakes is the broad task that Christopher Fettweis sets for himself in his new book. In his view, the primary source of blunders in American foreign policy is the nation’s deep and collective attachment to a series of pathological beliefs that he groups into the categories of fear, honor, glory, and hubris. These four pathologies do not lead to random errors in foreign policy making, but instead “almost always lend support to the most hawkish, belligerent position in any foreign policy debate. Fear, honor, glory, and hubris rarely convince leaders to cooperate with rivals or foes; these categories of belief expand the set of casus belli far more widely than any rational calculation would support” (14).

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