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Foreign Affairs
The Future of the American Pacifier
By John J. Mearsheimer
John J. Mearsheimer is R. Wendell Harrison Distinguished Service Professor of Political Science at the University of Chicago. This article is adapted from his forthcoming book The Tragedy of Great Power Politics.
Passing the Buck
The central aim of American foreign policy has traditionally been to dominate the western hemisphere while not permitting another great power to dominate Europe or Northeast Asia. The United States has not wanted a peer competitor. In the wake of the Cold War, U.S. policymakers remain firmly committed to this goal. An important Pentagon planning document stated in 1992, "Our first objective is to prevent the reemergence of a new rival . . . that poses a threat on the order of that posed formerly by the Soviet Union. . . . Our strategy must now refocus on precluding the emergence of any potential future global competitor."
In pursuit of this goal, the United States has behaved as an offshore balancer, committing troops to Europe and Northeast Asia only when there was a potential hegemon in those neighborhoods that the local powers could not contain by themselves. In effect, the United States has followed a "buck-passing" strategy — remaining on the sidelines while getting others to bear the burden of deterring or fighting aggressors — until it could no longer do so safely. Unless this realist pattern of behavior changes radically, the future of the U.S. military commitments to Europe and Northeast Asia can thus be expected to hinge on whether a potential hegemon emerges in either region that can be contained only with American help. If not, the more than 100,000 U.S. troops based in each region will probably leave in the first decade or so of the new century.
But if the power structures that are now in place in Europe and Northeast Asia are benign, they are not sustainable for much longer. The most likely scenario in Europe is an eventual American exit coupled with the emergence of Germany as the dominant state. In effect, the region will probably move from its present bipolarity (with the United States and Russia as the poles) to unbalanced multipolarity, which will lead to more intense security competition among the European powers.
The evolution of the power structure in Northeast Asia, meanwhile, will depend on whether China's rise continues. If China does not become a potential hegemon, the United States is likely to pull its troops out of the area, thereby encouraging Japan to build up its military capability and become a great power once again. The regional system would remain multipolar and balanced, but security competition would be somewhat more intense than it is today.
If China does emerge as a potential hegemon, however, Northeast Asia will fall into unbalanced multipolarity and the United States will move to contain the Chinese threat. Because China has such vast latent power potential (due to the size of its economy and its population), this last scenario is clearly the most dangerous . . .