Entrepreneurialism and National Success

Fareed Zakaria has shown in The Post-American World that numerous nations around the world are now drastically increasing their influence and national prosperity.  

Most of them are doing it in a simple way, by incentivizing entrepreneurial behavior and a growing class of producers.  

Unlike aristocratic classes, successful entrepreneurs are mostly self-made (with the help of mentors and colleagues) and have a deep faith in free enterprise systems which allow opportunity to all people regardless of their background or starting level of wealth.

America set the example in using this format to become wealthy and powerful. 

So why isn't the U.S. leading this trend now?