Saying energy prices would stay high was one of the great forecasting errors of the late 1970s and early '80s — so it's a little scary to predict that they will stay high this time around. But the fact that even the slightest hint of a turnaround in the global economy has sent oil prices skyrocketing from $35 a barrel to more than $70 ought to be a sign that the upward price cycle that started a decade ago isn't played out yet. The crucial element may be that the struggling U.S. no longer drives the global demand cycle — China and India do.