The dollar standard has been the main currency for international trade since 1945, making it easier for countries to do business with each other. However, the U.S. has sometimes made other countries unhappy with its unpredictable monetary policies. This has led to problems like inflation, asset bubbles, and global credit crises. The U.S. also can't control its own exchange rate under this system, which has caused tensions with countries like Japan and China. Despite these issues, both governments and businesses still choose to use the dollar standard for trade.