Question

How urbanisation was important for mesopotamia?

Answer 1

It was important in many ways:
It led less prosperous tribes to successful settlement.
It led to a civilised life.
It was a means to settle cities to save from unpredictability of the Tigris and Euphrates rivers of their unexpected unleash and their power to destroy.
The security of urban living, seems to have attracted the populace of the region to urban centers.