The kind of efficient system of Harappans of Dholavira, developed for conservation, harvesting and storage of water speaks eloquently about their advanced hydraulic engineering. Dholavira had the sophisticated water conservation system of channels and reservoirs, the earliest found anywhere in the world and completely built out of stone.
The archaeological record of the Indus civilization provides practically no evidence of armies, kings, slaves, social conflict, prisons, and other oft-negative traits that we traditionally associated with early civilizations. If there were neither slaves nor kings, a more egalitarian system of governance may have been practiced. Besides, compared to other ancient civilizations the houses were of nearly equal size indicating a more egalitarian social structure i.e. The Social System of the Harappans was fairly egalitarian.
Potteries of the Harappan Civilization bring out the gradual evolutionary trend in the culture. It is on the basis of different types of potteries and ceramic art from found over the different stages of the civilization, it can be said that Harappan culture was not static and did not disappear suddenly. While showing signs of decay, in course of time it rejuvenated itself by reviving some of the earlier ceramic traditions and evolving new ones in the transitional phase.
