We are all members of the 9/11 generation.
The defining challenges of the twentieth century ended with the fall of the Berlin Wall. Full recognition of the first great challenge of the twenty-first century came with the attacks of September 11, 2001, even though Islamist terrorists had begun their assault on world order decades before. Confronted with an act of war on American soil, our old assumptions about conflict between nation-states fell away. Civilization itself, and the international system, had come under attack by a ruthless and radical Islamist enemy.
America and its allies have made progress since that terrible day. We have responded forcefully to the Terrorists' War on Us, abandoning a decadelong—and counterproductive—strategy of defensive reaction in favor of a vigorous offense. And we have set in motion changes to the international system that promise a safer and better world for generations to come.
But this war will be long, and we are still in its early stages. Much like at the beginning of the Cold War, we are at the dawn of a new era in global affairs, when old ideas have to be rethought and new ideas have to be devised to meet new challenges.
The next U.S. president will face three key foreign policy challenges. First and foremost will be to set a course for victory in the terrorists' war on global order. The second will be to strengthen the international system that the terrorists seek to destroy. The third will be to extend the benefits of the international system in an ever-widening arc of security and stability across the globe. The most effective means for achieving these goals are building a stronger defense, developing a determined diplomacy, and expanding our economic and cultural influence. Using all three, the next president can build the foundations of a lasting, realistic peace.
Achieving a realistic peace means balancing realism and idealism in our foreign policy. America is a nation that loves peace and hates war. At the core