The United States already measures at the top or close to the top of nearly every global measure of economic competitiveness. A comprehensive 2008 Rand Corporation study found that the U.S. leads the world in scientific and technological development. The U.S. now accounts for a third of the world’s research-and-development spending. Partly as a result, the average American worker is nearly 10 times more productive than the average Chinese worker, a gap that will close but not go away in our lifetimes.

This produces a lot of dynamism. As Stephen J. Rose points out in his book “Rebound: Why America Will Emerge Stronger From the Financial Crisis,” when income is adjusted for family size, the percentage of prime-age American adults earning between $35,000 and $70,000 declined by 12 points between 1979 and 2007. But that’s largely because the percentage earning more than $105,000 increased by 14 points. Over the last 10 years, 60 percent of Americans made more than $100,000 in at least one of those years, and 40 percent had incomes that high for at least three.

As the world gets richer, demand will rise for the sorts of products Americans are great at providing  emotional experiences. Educated Americans grow up in a culture of moral materialism; they have their sensibilities honed by complicated shows like “The Sopranos,” “The Wire” and “Mad Men,” and they go on to create companies like Apple, with identities coated in moral and psychological meaning, which affluent consumers crave.

As the rising generation leads an economic revival, it will also participate in a communal one. We are living in a global age of social entrepreneurship.

In 1964, there were 15,000 foundations in the U.S. By 2001, there were 61,000. In 2007, total private giving passed $300 billion. Participation in organizations like City Year, Teach for America, and College Summit surges every year. Suburbanization helps. For every 10 percent reduction in population density, the odds that people will join a local club rise by 15 percent. The culture of service is now entrenched and widespread.

In sum, the U.S. is on the verge of a demographic, economic and social revival, built on its historic strengths. The U.S. has always been good at disruptive change. It’s always excelled at decentralized community-building. It’s always had that moral materialism that creates meaning-rich products. Surely a country with this much going for it is not going to wait around passively and let a rotten political culture drag it down.