The price of gold passed $500 an ounce last week, its highest level since the late 1980s. This is either an ominous development—or it isn't... If you'd lived a century ago, gold would have been the basis of your money. Great Britain dominated the global gold standard; its currency, the pound, was freely convertible into gold... On April 5, 1933, President Franklin D. Roosevelt ordered Americans to surrender their gold coin; the country effectively went on a paper-money standard... Higher demand collides with constricted supplies; wham, prices rise... Gold is an unending mystery, because its value lies less in what...