The underlying expectation -- that the present is supposed to be better than the past -- is a new phenomenon in history. No 18th-century politician would have asked "Are you better off than you were four years ago?" because it never would have occurred to anyone that they ought to be better off than they were four years ago.

(Also see Living in the Age of Abundance.)

clipped from online.wsj.com A Brief History of Economic Time Modern humans first emerged about 100,000 years ago. For the next 99,800 years or so, nothing happened. Well, not quite nothing. There were wars, political intrigue, the invention of agriculture -- but none of that stuff had much effect on the quality of people's lives. Almost everyone lived on the modern equivalent of $400 to $600 a year, just above the subsistence level. True, there were always tiny aristocracies who lived far better, but numerically they were quite insignificant. Then -- just a couple of hundred years ago, maybe 10 generations -- people started getting richer. And richer and richer still. Per capita income, at least in the West, began to grow at the unprecedented rate of about three quarters of a percent per year. A couple of decades later, the same thing was happening around the world.