Book Reviews Dyman Associates Publishing Inc - In "The Wealth of Nations," Adam Smith wrote, "The sole use of money is to circulate consumable goods." Truer words have rarely been written, but the remarkable thing about Smith's passage was that it was a throwaway line in what remains to this day one of the most important books on economics ever written. Smith's line about money was throwaway simply because it was a tautology. The world is round, the sun sets in the west, and yes, money's sole purpose is to facilitate exchange. Money is not wealth, it's merely what we use to measure our production so that we can exchange it for that which we don't have, not to mention place a value on investments representing the production of future wealth. Precisely because money is a measure, much like a foot and minute are, it's essential that its value be as stable as possible. Gold has historically been used to define money not because it's nice to look at, but simply because its stability renders it "money, par excellence," in the words of Karl Marx.