Since the end of World War II, the United States has pursued a single grand strategy: deep engagement. In an effort to protect its security and prosperity, the country has promoted a liberal economic order and established close defense ties with partners in Europe, East Asia, and the Middle East. Its military bases cover the map, its ships patrol transit routes across the globe, and tens of thousands of its troops stand guard in allied countries such as Germany, Japan, and South Korea.
The details of U.S. foreign policy have differed from administration to administration, including the emphasis placed on democracy promotion and humanitarian goals, but for over 60 years, every president has agreed on the fundamental decision to remain deeply engaged in the world, even as the rationale for that strategy has shifted. During the Cold War, the United States' security commitments to Europe, East Asia, and the Middle East served primarily to prevent Soviet encroachment into the world's wealthiest and most resource-rich regions. Since the fall of the Soviet Union, the aim has become to make these same regions more secure, and thus less threatening to the United States, and to use these security partnerships to foster the cooperation necessary for a stable and open international order.
Now, more than ever, Washington might be tempted to abandon this grand strategy and pull back from the world. The rise of China is chipping away at the United States' preponderance of power, a budget crisis has put defense spending on
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