At Harappan sites, there is a clear division of the citadel and lower towns. The site of Dholavira is divided into three regions that are upper, middle and lower town. Therefore the clear evidences of social division directed us towards the proximity of two dominant groups: religious and political. Separation of temples and fortresses from the lower town made these hypotheses stronger to believe in.
The idea that societies and nations have unique levels of development on an international basis is a wide notion of international or global development.
I hope this helps, and as always, I am joyous to assist anyone at any time.
