GRESHAM’S LAW DOESN’T go far enough. Not only does “bad money drive out good money” but, as we can now see, bad anything drives out good anything. Fudge-covered graham crackers have driven out real chocolate ones; apartments with low ceilings and thin walls have replaced older, sturdier dwellings; and in restaurant lavatories the so-called hand-drying machine has eliminated the rotating cloth towel. Plastic, of course, has replaced just about everything: the lacquered wooden dashboard in your car, the leather buckle on your coat, and the bone buttons on your suit, the ivory keys of your piano, and even the tiny wooden hotel in your Monopoly game.