Researches of scientists have shown that the most ancient civilizations originated in the valleys of the largest rivers – in the fertile valleys of the Nile, Euphrates, Tigris, Indus and Yellow River, large masses of people rushed.
They created their cities and settlements on the oeregs of the rivers, which were then united into states
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.