Metallic money

The Bretton Woods system
During World War II, Great Britain and the United States outlined the postwar monetary system. Their plan, approved by more than 40 countries at the Bretton Woods Conference in July 1944, aimed to correct the perceived deficiencies of the interwar gold exchange standard. These included the volatility of floating exchange rates, the inflexibility of fixed exchange rates, and reliance on an adjustment mechanism for countries with payment surpluses or deficits; these problems were often resolved by recession and deflation in deficit countries coupled with expansion and inflation in surplus countries. The agreement that resulted from the conference led to the creation of the International Monetary Fund (IMF), which countries joined by paying a subscription. Members agreed to maintain a system of fixed but adjustable exchange rates. Countries with payment deficits could borrow from the fund, while those with surpluses would lend. If deficits or surpluses persisted, the agreement provided for changes in exchange rates. The IMF began operations in 1947, with the U.S. dollar serving as the fund’s reserve currency and the price of gold fixed at $35 per ounce. The U.S. agreed to maintain that price by buying or selling gold.
Postwar recovery, low inflation, growth of trade and payments, and the buildup of international reserves in industrial countries permitted the new system to come into full operation at the end of 1958. Although a vestigial tie to gold remained with the gold price staying at $35 per ounce, the Bretton Woods system essentially put the market economies of the world on a dollar standard—in other words, the U.S. dollar served as the world’s principal currency, and countries held most of their reserves in interest-bearing dollar securities.
The dollar became the most widely used currency in international trade, even in trade between countries other than the United States. It was the unit in which countries expressed their exchange rate. Countries maintained their “official” exchange rates by buying and selling U.S. dollars and held dollars as their primary reserve currency for that purpose. The existence of a dollar standard did not prevent other countries from changing their exchange rates, just as the gold standard did not prevent other currencies from “devaluing” or “appreciating” in terms of gold. In time, however, the fixed price of gold became increasingly difficult for the United States to maintain. Many countries devalued or revalued their currencies, including major economic powers such as the United Kingdom (in 1967), Germany, and France (both in 1969). Yet in practice the United States was not free to determine its own exchange rate or its balance of payments position. Monetary expansion in the United States provided reserves for other countries; monetary contraction absorbed reserves. Central banks could convert dollars into gold, and they did, especially in the early years. As the stock of dollars held by central banks outside the United States rose and the U.S. gold stock dwindled, the United States could not honour its commitment to convert gold into dollars at the fixed rate of $35 per ounce. The Bretton Woods system of fixed exchange rates appeared doomed. Governments and central banks tried for years to find a way to extend its life, but they could not agree on a solution. The end came on Aug. 15, 1971, when Pres. Richard M. Nixon announced that the United States would no longer sell gold.