After Iraq, we may be tempted to turn inward. That would be a mistake. The American moment is not over, but it must be seized anew. We must bring the war to a responsible end and then renew our leadership -- military, diplomatic, moral -- to confront new threats and capitalize on new opportunities. America cannot meet this century's challenges alone; the world cannot meet them without America.
Barack Obama is a Democratic Senator from Illinois
and a candidate for the Democratic presidential nomination.
COMMON SECURITY FOR OUR COMMON HUMANITY
At moments of great peril in the last century, American leaders such as Franklin Roosevelt, Harry Truman, and John F. Kennedy managed both to protect the American people and to expand opportunity for the next generation. What is more, they ensured that America, by deed and example, led and lifted the world -- that we stood for and fought for the freedoms sought by billions of people beyond our borders.
As Roosevelt built the most formidable military the world had ever seen, his Four Freedoms gave purpose to our struggle against fascism. Truman championed a bold new architecture to respond to the Soviet threat -- one that paired military strength with the Marshall Plan and helped secure the peace and well-being of nations around the world. As colonialism crumbled and the Soviet Union achieved effective nuclear parity, Kennedy modernized our military doctrine, strengthened our conventional forces, and created the Peace Corps and the Alliance for Progress. They used our strengths to show people everywhere America at its best.
Today, we are again called to provide visionary leadership. This century's threats are at least as dangerous as and in some ways more complex than those we have confronted in the past. They come from weapons that can kill on a mass scale and from global terrorists who respond to alienation or perceived injustice with murderous nihilism. They come from rogue states allied to terrorists and from rising powers that could challenge both America and the international foundation of liberal democracy. They come from weak states that cannot control their territory or provide for their people. And they come from a warming planet that will spur new diseases, spawn more devastating natural disasters, and catalyze deadly conflicts.
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Today, America's economic vitality and military strength are unparalleled. America is at the hub of a changing economic world and must ambitiously promote open competition among regions. But the last century proved that economics alone does not ensure peace, so America must have unquestioned military superiority as well. A Republican administration must undo the mistakes of the last eight years.
By stressing unilateralism over cooperation, preemption over prevention, and firepower over staying power, the Bush administration has alienated the United States' natural allies and disengaged from many of the world's most pressing problems. To restore U.S. global standing--which is essential in checking the spread of lethal weapons and winning the war on terrorism--the next Democratic president must recognize the obvious: that means are as important as ends.
With no Soviet threat, America has found it exceedingly difficult to define its "national interest." Foreign policy in a Republican administration should refocus the country on key priorities: building a military ready to ensure American power, coping with rogue regimes, and managing Beijing and Moscow. Above all, the next president must be comfortable with America's special role as the world's leader.

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