The monetary system has evolved over time from the gold standard to Bretton Woods to floating exchange rates today. Under Bretton Woods, currencies were pegged to the US dollar which was pegged to gold. This system collapsed in the 1970s and most currencies now float against each other. The IMF and World Bank still play important roles in providing loans and advice to member countries. Managers must consider currency risk and maintain flexibility in their business strategies due to the uncertainties of floating exchange rates.