Why are the cities that arose at the turn of the 4th-3rd millennia BC referred to as a fundamentally new phenomenon in history?

Because the emergence of civilization is associated with the emergence of the first cities. Cities began to actively develop trade, build their defenses, fight for territory and resources, and learn the architectural skills of building buildings and streets. Also, there was a water supply and sewerage system in houses.

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.