Before wars exhaust America’s patience and treasury, they can generate even more far-reaching aspirations. Higher purposes vary. During the Spanish-American War, President William McKinley felt obliged to set his sights beyond Cuba in order to uplift, civilize, and Christianize Filipinos. World War I was supposed to be the war to end all wars. When World War II followed soon thereafter, Washington set to work creating an ambitious network of institutions to prevent World War III.

These initiatives remain models of success that subsequent Presidents have found themselves shorn of the means or conditions to emulate. Washington’s construction efforts have gotten smaller ever since. Fighting prolonged wars in the wrong places accelerate diminishment. Nation-building in Afghanistan and Iraq may actually be harder than creating NATO and the United Nations after World War II.

The George W. Bush administration’s war of choice in Iraq is now coming to an end nine years, more than a trillion dollars, and countless victims after its initiation. The “global war on terror” lent itself to such unbounded grief and excess. Only now is the Obama administration beginning to correlate diminished means to more realistic ends in dealing with violent extremism.

The twin apogees of dream-catching during the Bush administration were surely its 2002 National Security Strategy and the President’s second inaugural address. For those with short memories, here are some snippets from the 2002 National Security Strategy:

In a world that is safe, people will be able to make their own lives better. We will defend the peace by fighting terrorists and tyrants….

Our enemies have openly declared that they are seeking weapons of mass destruction, and evidence indicates that they are doing so with determination… America will act against such emerging threats before they are fully formed… History will judge harshly those who saw this coming danger but failed to act. In the new world we have entered, the only path to peace and security is the path of action….

The United States will use this moment of opportunity to extend the benefits of freedom across the globe. We will actively work to bring the hope of democracy, development, free markets, and free trade to every corner of the world.

And here are excerpts from President Bush’s 2005 inaugural address:

The survival of liberty in our land increasingly depends on the success of liberty in other lands….

The best hope for peace in our world is the expansion of freedom in all the world….

So it is the policy of the United States to seek and support the growth of democratic movements and institutions in every nation and culture with the ultimate goal of ending tyranny in our world…..

America’s influence is not unlimited, but fortunately for the oppressed, America’s influence is considerable and we will use it confidently in freedom’s cause.

These passages now read like an antiquarian text. Faint echoes can be found in presidential candidate Mitt Romney’s foreign-policy vagaries, but most of us are sadder and wiser now. Just ten years ago, however, the United States was strong, solvent, and set off-kilter by nineteen hijackers. Americans were called upon to defend and protect against poisonous thinking in ways that created more of it. A conservative Republican president, enabled by unparalleled power-projection capabilities and a malleable Congress, undertook two military campaigns that required great sacrifices of soldiers but not of those who wished them well. Growing US divisions and insolvency were the natural result.

This missionary and muscular US response to 9/11 — Wilsonianism on steroids – appears likely to produce no more than tenuous rewards. Despite the heroic efforts of US military forces, the sorrows of Iraq have by no means run their course. Whatever the travails to come, this country of great potential and enduring factionalism will at least be rid of Saddam Hussein & Sons. As for Afghanistan, another trillion-dollar expedition, it does not take a crystal ball to foresee that US sacrifices will only marginally help prevent the return of history.