From David Leonhardt at the New York Times, a good, if very partial explanation of why the overall future of the US and the Global North generally doesn't look as promising as the 30s. See if you can guess what's missing from the article.
Still, the reasons for concern today are serious. Even before the financial crisis began, the American economy was not healthy. Job growth was so weak during the economic expansion from 2001 to 2007 that employment failed to keep pace with the growing population, and the share of working adults declined. For the average person with a job, income growth…