There is a saying that "agriculture is the foundation of the country", which has a lot to do with why ancient civilization originated in the river basin. According to the history textbook, every year, there will be something similar to the ebb and flow of rivers in river areas. A large number of rivers bring fertile soil to the bottom of rivers, which is very conducive to the growth of crops, so it promotes the development of agriculture in this area, thus promoting history, agricultural prosperity and naturally making a strong contribution to economic progress.
As for the lost ancient civilization, the demise and rise of any country are determined by its social system and legal system. Slave society, paying attention to monarchical power, was called slave owners at that time, and the backwardness of society determined the backward social system and backward production relations. There is a saying that extremes meet, and the relationship between workers and exploiters is not always like this. When patience with oppression turns into anger, it is time for workers to make a fuss about the rights of exploiters. That is to say, these reasons are often said to be inevitable, also known as historical inevitability.