Money originated around 100,000 years ago when items were used for barter and trade. The Lydians were the first to coin money using silver and gold to represent wealth. After World War II, most governments tied their currencies to the US dollar, establishing fiat monetary systems based on government backing rather than gold. Money facilitates the exchange of goods and services instead of bartering. The US Mint uses a six-step process to produce coins, starting with cutting coin blanks from metal sheets and ending with counting and bagging the finished coins.