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the fact that suppressing terrorism will take years of patient, unspectacular civilian co-operation with other countries. The military success in Afghanistan dealt with the easiest part of the problem, and al-Qaeda retains cells in some 50 countries. Rather than proving the unilateralists' point, the partial nature of the success in Afghanistan illustrates the continuing need for co-operation.
The perils of going alone
The problem for Americans in the 21st century is that more and more things fall outside the control of even the most powerful state. Although the United States does well on the traditional measures, there is increasingly more going on in the world that those measures fail to capture. Under the influence of the information revolution and globalization, world politics is changing in a way that means Americans cannot achieve all their international goals by acting alone. For example, international financial stability is vital to the prosperity of Americans, but the United States needs the co-operation of others to ensure it. Global climate change too will affect Americans' quality of life, but the United States cannot manage the problem alone. And in a world where borders are becoming more porous to everything from drugs to infectious diseases to terrorism, America must mobilize international coalitions to address shared threats and challenges.
The barbarian threat
In light of these new circumstances, how should the only superpower guide its foreign policy in a global information age? Some Americans are tempted to believe that the United States could reduce its vulnerability if it withdrew troops, curtailed alliances and followed a more isolationist foreign policy. But isolationism would not remove the vulnerability. The terrorists who struck on September 11th were not only dedicated to reducing American power, but wanted to break down what America stands for. Even if the United States had a weaker foreign policy, such groups would resent the power of the American economy which would still reach well beyond its shores. American corporations and citizens represent global capitalism, which some see as anathema.
Moreover, American popular culture has a global reach regardless of what the government does. There is no escaping the influence of Hollywood, CNN and the Internet. American films and television express freedom, individualism and change, but also sex and violence. Generally, the global reach of American culture helps to enhance America's soft power. But not, of course, with everyone. Individualism and liberties are attractive to many people but repulsive to some, particularly fundamentalists. American feminism, open sexuality and individual choices are profoundly subversive of patriarchal societies. But those hard nuggets of opposition are unlikely to catalyze broad hatred unless the United States abandons its values and pursues arrogant and overbearing policies that let the extremists appeal to the majority in the middle.
On the other hand, those who look at the American preponderance, see an empire, and urge unilateralism, risk an arrogance that alienates America's friends. Granted, there are few pure multilateralists in practice, and multilateralism can be used by smaller states to tie the United States down like Gulliver among the Lilliputians, but this does not mean that a multilateral approach is not generally in America's interests. By embedding its policies in a multilateral framework, the United States can make its disproportionate power more legitimate and acceptable to others. No large power can afford to be purely multilateralist, but that should be the starting point for policy. And when that great power defines its national interests broadly to include global interests, some degree of unilateralism is more likely to be acceptable. Such an approach will be crucial to the longevity of American power.
At the moment, the United States is unlikely to face a challenge to its pre-eminence from other states unless it acts so arrogantly that it helps the others to overcome their built-in limitations. The greater challenge for the United States will be to learn how to work with other countries to control more effectively the non-state actors that will increasingly share the stage with nation-states. How to control the bottom chessboard in a three-dimensional game, and how to make hard and soft power reinforce each other are the key foreign policy challenges. As Henry Kissinger has argued, the test of history for this generation of American leaders will be whether they can turn the current predominant power into an international consensus and widely-accepted norms that will be consistent with American values and interests as America's dominance ebbs later in the century. And that cannot be done unilaterally.
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