Second, liberal hegemony is liberal, Posen explains, because “it aims to defend and promote a range of values associated with Western society in general and U.S. society in particular.” Democracy looms large among these values, particularly because this approach identifies “failed states, rogue states, and illiberal peer competitors” as the primary source of threats to the U.S. and global peace. In short, these latter-day Wilsonians believe that “the United States can only be truly safe in a world full of states like us, and so long as the United States has the power to pursue this outcome, it should.”
Posen argues that this strategy has not performed very well in the post-Cold War era and will only “perform less and less well” in the changing world of the future. Liberal hegemony has been, and will continue to be, quite costly in terms of blood and treasure: the U.S. has fought four wars since 1992, spent trillions of dollars in these conflicts and on maintaining the armed forces, and has suffered great opportunity costs in the process. Liberal hegemony provokes other states to engage in “sustained obstructionism,” if not outright balancing against the U.S., and it has incentivized our allies, such as NATO and Japan, to “cheap ride” when they could contribute more—thus making the benefits of U.S. security commitments incommensurate with the costs. Worse, some allies, such as Israel and Iraq, are “reckless drivers” that “do the wrong things,” and the U.S. has little ability to rein them in.
Both the book and the review were published in 2014 but I’m only reading this review now. You can read the rest of the review here.