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 rare material, and the value of the money is determined by the amount of the material it contains. …
