Definately in decline but we are not spiraling out of control. China and India are only advancing because of their absurdly large populations. One billion Chinese live in absolute poverty. But 300 million live at working class levels or better, that is roughly the size of the US population. So China seems to do OK but this is overlooking the huge poverty issue.
China and India both have around 75% of their populations infected with latent TB for instance, according to the WHO. A nation that can’t control basic illnesses is not going to be up for any major challenges anytime soon.
The USA still remains the only nation with any real ability to influence the world as a whole. Many regional powers exist. The USA isn’t France in 1939, which was already a third or fourth rate power pretending to be a first rate power.
In terms of technology and medicine the forefront is still located in the USA. This is where the “action” is and that is good.
The USA right now is undergoing a change in its economy. We had a similar change in the 80s when we lost the manufacturing sector and changed to a service economy. That resulted in the worst recession since the 30s. Now we are undergoing a similar change as the economy adjusts again, resulting in an even worse recession than we had in the early 80s.
This downturn has weeded out a lot of the deadwood that was hired in the late 90s when jobs were everywhere.
Fear drives a lot of the talk. When radio came out, it was assumed it would harm the movies as it was free and the Great Depression was in full swing. But movies adjusted their marketing and the two did fine together. When TV came in, the same fear came about. But both radio and film adjusted their business models and learned to live together by the 1960s.
This is what we are going through now. Older businesses are resistant to change and are fighting back through court cases and technology. Eventually they will lose and adjust their business models and learn to live with the new ways of life.
So when you ask a loaded question like is the USA in decline, you’re going to get “yes” as an answer simply 'cause the USA was so far up on the scale, that it can’t go anywhere else but down. And don’t be fooled by things like “country X was up 50%.” Percents are meaningless unless you put them with their proper numbers.
After all if a town has one murder in 2009 and 2 murders in 2010, the murder rate has doubled but overall it’s not a big deal, unless you’re one of those three killed 