the end of pax americana; how western decline became inevitable

TheAtlantic | When great powers begin to experience erosion in their global standing, their leaders inevitably strike a pose of denial. At the dawn of the twentieth century, as British leaders dimly discerned such an erosion in their country's global dominance, the great diplomat Lord Salisbury issued a gloomy rumination that captured at once both the inevitability of decline and the denial of it. "Whatever happens will be for the worse," he declared. "Therefore it is our interest that as little should happen as possible." Of course, one element of decline was the country's diminishing ability to influence how much or how little actually happened.

We are seeing a similar phenomenon today in America, where the topic of decline stirs discomfort in national leaders. In September 2010, Secretary of State Hillary Clinton proclaimed a "new American Moment" that would "lay the foundations for lasting American leadership for decades to come." A year and a half later, President Obama declared in his State of the Union speech: "Anyone who tells you that America is in decline . . . doesn't know what they're talking about." A position paper from Republican presidential candidate Mitt Romney stated flatly that he "rejects the philosophy of decline in all of its variants." And former U.S. ambassador to China and one-time GOP presidential candidate Jon Huntsman pronounced decline to be simply "un-American."

Such protestations, however, cannot forestall real-world developments that collectively are challenging the post-1945 international order, often called Pax Americana, in which the United States employed its overwhelming power to shape and direct global events. That era of American dominance is drawing to a close as the country's relative power declines, along with its ability to manage global economics and security.

This does not mean the United States will go the way of Great Britain during the first half of the twentieth century. As Harvard's Stephen Walt wrote in this magazine last year, it is more accurate to say the "American Era" is nearing its end. For now, and for some time to come, the United States will remain primus inter pares--the strongest of the major world powers--though it is uncertain whether it can maintain that position over the next twenty years. Regardless, America's power and influence over the international political system will diminish markedly from what it was at the apogee of Pax Americana. That was the Old Order, forged through the momentous events of World War I, the Great Depression and World War II. Now that Old Order of nearly seven decades' duration is fading from the scene. It is natural that U.S. leaders would want to deny it--or feel they must finesse it when talking to the American people. But the real questions for America and its leaders are: What will replace the Old Order? How can Washington protect its interests in the new global era? And how much international disruption will attend the transition from the old to the new?