What was the economy during the Ancient Civilization?

During the period of ancient civilization, the economy was purely natural. People were engaged in agriculture and animal husbandry, but their strength was not enough to provide a full-fledged market. They produced goods in small quantities, since they almost did not use fertilizers and mechanisms that improve fertility. They had enough products for in-kind exchange at small fairs. People did not fully utilize the development of artisans in agriculture. Agriculture has developed extensively.