It gave purpose and clarity to our politics and foreign policy, and our lives.
From the fall of Berlin in 1945 to the fall of the Berlin Wall in 1989, that Cold War was waged by two generations, and with its end Americans faced a fundamental question:
If the historic struggle between communism and freedom is over, if the Soviet Empire and Soviet Union no longer exist, if the Russians wish to befriend us and the Maoists have taken the capitalist road, what is our new mission in the world? What do we do now?
The debate was suspended when Saddam Hussein invaded Kuwait. George H.W. Bush assembled a mighty coalition and won a war that required but 100 hours of ground combat.
We had found our mission.
The United States was the last superpower and a triumphant Bush declared that we would build the "New World Order." Neoconservatives rhapsodized over America's "unipolar moment" and coming "global hegemony."
But Americans were unpersuaded and uninspired. They rejected the victor of Desert Storm -- for Bill Clinton. By Y2K, the Republican Party was backing another Bush who was promising a "more humble" America.
Came then 9/11 and the midlife conversion of George W. to Wilsonian interventionism. After the rout of the Taliban in December 2001, Bush decided to remake Afghanistan in the image of Iowa and to go crusading against an axis of evil. In his second inaugural, he declared that America's mission was to "end tyranny in our world."
The world declined to oblige. By the end of 2006, the Taliban were back and America seemed in an endless war in Iraq. Republicans had lost Congress and Bush's democracy crusade was producing electoral victories for Hamas and Hezbollah.
In November 2008, the crusaders were sent packing.
Came then Barack Obama. With the "Arab Spring" beginning in 2010, with dictators being toppled in Tunisia, Egypt, Yemen, Libya and Syria, Obama embraced the movement as his own.
But Obama received a rude awakening. As the Arab dictators began, one by one, to fall, also unleashed and now surging and spreading through the lands they had ruled were the four horsemen of the Arab apocalypse: tribalism, ethno-nationalism, Islamic fundamentalism and anti-Americanism. So we come to an elementary question: