While America is currently in decline, there's hope. The United States is the largest exporter of intangible services.
Intangible services are the most important economic sector for post-industrial nations in the 21st century. And exports generate the most jobs. Forget manufacturing as a job creator. It's intangibles and the Knowledge Work society that creates prosperity for post-industrial countries.
Here's a fascinating chart showing the increase in intangible services, called "private services" because they exclude government.