It had better and larger population
I believe the answer is: Fertile Crescent
Fertile Crescent is a term that used to described a region where human civilizations could thrive due to its capability to sustain many agricultural products. In most cases, this region possess both soil with high amount of nutrients and located not far from a water source.
Answer: it made them rich
Explanation:
Naturalization is the process of becoming a citizen of a country where you don't come from. After you naturalize, you get the rights and responsibilities of being that country's citizen.