It seems likely that Social Security reform will be Topic A for the next year or so, especially if Iraq's progress toward forming a permanent government goes well. But it also seems as though the fate of our retirement funds causes almost as much apprehension as the future of Baghdad. So in the spirit of calming fears on the Social Security front, let's examine a scare story making the rounds. It is the claim that history all but proves attempting to save enough for a comfortable retirement will be impossible. Princeton University economist and New York Times columnist Paul Krugman...