right now, there are people declaring that our best days are behind us, that the economy has suffered a general loss of dynamism, that it’s unrealistic to expect a quick return to anything like full employment. There were people saying the same thing in the 1930s! Then came the approach of World War II, which finally induced an adequate-sized fiscal stimulus — and suddenly there were enough jobs, and all those unneeded and useless workers turned out to be quite productive, thank you.