Why do we say that it was not natural fertility and high levels of food production that were the causes of early urbanization?

Answer:
It is often said that natural fertility and high levels of food production were the causes of early urbanization. It is because of the following reasons:

• Natural fertility encourages settled life and agricultural production.
• It paved the way for animal husbandry.
• Fertility of the soil was also helpful in the beginning of new occupations.
• Flourishing trade and commerce is also another major factor for urbanization.
• The development of art of writing and administration played a very critical role in the development of urbanization.