the use of metal tools, plowing on bulls led to the fact that people had more bread, vegetables, meat and milk; the role of agriculture and cattle breeding in the economy has increased significantly. Gradually, these activities become the main ones. It has become easier to cultivate the land, and the harvests have increased. Now some people could work in the field, while others could do a craft. Now you can exchange products.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.