I'm not buying this argument, Kurt. As I've said in other posts, in my lifetime the US has always appeared to be screwed up and unprepared. We've always been divided, IMO more so in the past than in the present. We've always done dumb things, like various little wars we waste our wealth on and never win, at least not since Korea in the 1950s. We were so unprepared and complacent before 9/11. We weren't even prepared for Pearl Harbor. The Japanese could have overrun the entire west coast, probably to the Rockies, if they had only known how defenseless we were. In the 1980s I was working in the computer industry and in the fear that Japan would overtake us technologically and economically, with their 5th Generation Computing initiative, their analog HDTV, and their auto industry. So much for any of those problems. There were race riots in the 1960s and the 1990s. (I was in LA after the Rodney King incident.) Or perhaps the Energy Crisis of the 1970s (remember, it was capitalized), we would bankrupt ourselves paying OPEC countries and Peak Oil (remember Peak Oil?) meant there was no going back. Last year the US was largest oil producer in the world, and not by a little bit. Nixon having to resign from the presidency? The high inflation of the early 1980s? (I remember having a 13% mortgage, and the economy was a mess.) Clinton being impeached. The dot-com bubble. The financial system on the verge of collapse in 2008. The controversy over the outcome of the presidential election between Bush and Gore, and officials were examining and arguing over "chad". And through it all the bigotry and prejudice between ethnic groups, racial groups, religious groups, gays... it's been disgusting for... forever, as far as I'm concerned. I grew up in place where people talked about "mixed marriages". They were a white Catholic and a white Protestant. So stupid. I remember social clubs that didn't allow Catholics or Jews to join, never mind blacks or anyone with anything but white skin, or Muslims and Hindus.
The US I see now is not at its best, not even close, but nowhere near its worst. Economically we had it easy after WWII because everyone else had their infrastructure destroyed, and Asia lacked skills and training. Now we have competition, sometimes superior competition. Labor is cheaper overseas and sometimes more capable, and there's less government regulation. What a surprise. And the US is more diverse now than it was when I was growing up, which is bound to increase tensions. Should we be like France and try to demand cultural assimilation? What other country has ever tried diversity at the level we have? None I can think of. We are a mess, but I think we've always been a mess. And then we come out of it, surprisingly sometimes. I still think we will this time too.