Money and its definition.

Money Money was one arguably the most important invention for development to take place. Money has been independently invented at one time or another in each important civilization in the history of the world. There is also remarkable similarity in how the concept of money has evolved in different times in history and in different parts of the world. Historically, money has usually gone through four stages. In the first stage, money is made of …

…a guarantee that the metallic weight and content is right. It also makes all coins of the same sort equal. This may not seem like such a big deal today, but it once was a very important invention. Previously, metals had to be weighed in order to determine their value, and that made trade more difficult. In most cases, by the way, coins in metallic standards were named after the weight of metal they contained.