An increasing number of recent letters and e-mails from readers strike a note, not only of unhappiness with the way things are going in our society, but a note of despair. Those of us who are pessimists are only a step away from despair ourselves, so we may not be the ones to offer the best antidote to the view that America has seen its best days and is degenerating toward what may well be its worst. Yet what hope remains is no less precious nor any less worthy of being preserved. First of all, the day-to-day life of most...