American Declinism

http://risingpowers.foreignpolicyblogs.com/2009/08/21/the-return-of-declinism/
For this week topic, from the google research about American Declinism, I chose an article by David Kampf. In this article he says that even though it is fashionable to speak of America's fall and the rise of other countries, America will remain the world's default power for years to come.
According to Josef Joffe, he says 'The history of declinism shows that doom arrives in cycles, and what comes and goes, logically, does not a trend make'. The US economy is worth three times as much as Japan, which is the world's second largest economy and about the rising powers which is about China, he says that China still has a way to dethrone the US. He also says at the end of this article, 'as the 21st century unfolds, the United States will be younger and more dynamic than its competitors'.