I believe the answer is: The establishment of sedentary village communities.
I think both Imperial China and Rome were both able to create a strict government. They were able to create a social stratification that allows people to function according to their designated roles, They were able to enforce a strong military which leads to successful conquest of neighboring states.
The link is that trade has often been used historically to spread religious beliefs. This was especially common during early ages of Islam since Arabs were really important in the trade business since they were the middle people between far east and Europe. As they opened up trading posts across the Mediterranean they also spread their religious beliefs. This is one of the reasons why the North of Africa is for example mostly Muslim.
Answer:
So the possibilities of getting a new season exist between low to none and it's about time that we accept the end of this legendary show. Our best guess is that in the unlikely scenario of the anime getting renewed, 'Naruto Shippuden' release date could be sometime in 2021
Explanation:
