When Was Money Invented And How Did The US Dollar Become The World's Most Important Currency?

 Money as we know it today was first invented around 2,500 years ago in the form of metal coins. 

The use of paper money and other forms of currency has evolved over time, with different societies using different forms of money at different times.

The US dollar became the world's most important currency in the 20th century, largely due to the economic and military power of the United States following World War II. 

The Bretton Woods Agreement of 1944 established the dollar as the global reserve currency, and it has remained dominant in international trade and finance ever since. 

Additionally, many countries around the world have pegged their own currencies to the dollar, further solidifying its role as the world's most important currency.