No leadership impact – empirics.

Like many believers, proponents of hegemonic stability theory base their view on faith alone.41 There is precious little evidence to suggest that the United States is responsible for the pacific trends that have swept across the system. In fact, the world remained equally peaceful, relatively speaking, while the United States cut its forces throughout the 1990s, as well as while it doubled its military spending in the first decade of the new century.42 Complex statistical methods should not be needed to demonstrate that levels of U.S. military spending have been essentially unrelated to global stability.

Hegemonic stability theory’s flaws go way beyond the absence of simple correlations to support them, however. The theory’s supporters have never been able to explain adequately how precisely 5 percent of the world’s population could force peace on the other 95 percent, unless, of course, the rest of the world was simply not intent on fighting. Most states are quite free to go to war without U.S. involvement but choose not to. The United States can be counted on, especially after Iraq, to steer well clear of most civil wars and ethnic conflicts. It took years, hundreds of thousands of casualties, and the use of chemical weapons to spur even limited interest in the events in Syria, for example; surely internal violence in, say, most of Africa would be unlikely to attract serious attention of the world’s policeman, much less intervention. The continent is, nevertheless, more peaceful today than at any other time in its history, something for which U.S. hegemony cannot take credit.43 Stability exists today in many such places to which U.S. hegemony simply does not extend.

Overall, proponents of the stabilizing power of U.S. hegemony should keep in mind one of the most basic observations from cognitive psychology: rarely are our actions as important to others’ calculations as we perceive them to be.44 The so‐​called egocentric bias, which is essentially ubiquitous in human interaction, suggests that although it may be natural for U.S. policymakers to interpret their role as crucial in the maintenance of world peace, they are almost certainly overestimating their own importance. Washington is probably not as central to the myriad decisions in foreign capitals that help maintain international stability as it thinks it is.

The indispensability fallacy owes its existence to a couple of factors. First, although all people like to bask in the reflected glory of their country’s (or culture’s) unique, nonpareil stature, Americans have long been exceptional in their exceptionalism.45 The short history of the United States, which can easily be read as an almost uninterrupted and certainly unlikely story of success, has led to a (perhaps natural) belief that it is morally, culturally, and politically superior to other, lesser countries. It is no coincidence that the exceptional state would be called on by fate to maintain peace and justice in the world.