From Cattle To Currency: How Money Took Its Many Forms
Money is so common in daily life that it is easy to forget how unusual the idea really is. A small metal coin, a paper bill, or a digital balance on a screen has little practical value by itself. You cannot eat it, build with it, or use it as clothing. Money works because people share a belief that it represents value and can be exchanged for goods and services. Throughout history, that belief has taken many forms, from livestock and shells to coins and paper notes.