Money
Money ranks 7th in the list of surprising reasons behind 10 everyday inventions. Before portraits were printed on coins and paper, people traded a wide range of goods and services. Money, in reality, was created to account for people's debts. Money and society are roughly the same age, which makes sense. Anthropological evidence does not support the idea that humanity used a barter system before money. If you were a chicken farmer and all you had were chickens, how would you bargain with someone who didn't want one? What if everyone had a chicken already? As a result, a different transaction method was required. Anthropologists have found no historical evidence of such barter communities. As a result, debt-based money systems have always existed.
Everything, including limbs lost in battle, was valued in old legal documents. There was a monetary value attached to anything that was lost or destroyed. Money was created to account for what was required to pay someone in an appropriate and concise manner. No one could argue about the value of something in a transaction because it was fixed and recognized.