...there is only one large country in the developed world that does not face a future of stunning relative demographic and economic decline: the United States. Thanks to its relatively high fertility rate and substantial net immigration, its current global population share will remain virtually unchanged in the coming decades. According to the Carnegie projections, the US share of total G-20 GDP will drop significantly, from 34 percent in 2009 to 24 percent in 2050. The combined share of Canada, France, Germany, Italy, Japan, and the United Kingdom, however, will plunge from 38 percent to 16 percent.
By the middle of the twenty-first century, the dominant strength of the US economy within the developed world will have only one historical parallel: the immediate aftermath of World War II, exactly 100 years earlier, at the birth of the “Pax Americana.”
The UN regularly publishes a table ranking the world’s most populous countries over time. In 1950, six of the top twelve were developed countries. In 2000, only three were. By 2050, only one developed country will remain—the United States, still in third place. By then, it will be the only country among the top twelve committed since its founding to democracy, free markets, and civil liberties.
All told, population trends point inexorably toward a more dominant US role in a world that will need America more, not less.
---Neil Howe, Via Mauldin (firstname.lastname@example.org)