Many thousands of years ago bartering was quite common, to tell the experts from Stanford University. The rich Sumerians, for example, gave his subordinates a beer. Similar exchanges were observed among the Egyptians. According to the study, the day of the workers building the pyramid, got about five liters of beer.

As evidence the researchers cite is found the clay tablet on which a person uses beer from the conical vessel. This image more than 5 thousand years.

It should be noted that alcohol in ancient times was considered important sources of nutrients. About the dangers of it then no wonder.

Study proves fact: a commodity-market relations have existed already in the year 3000 BC. Accordingly, there must be other nuances of the life of ancient people about whom we do not know.

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