Political Life
There is no idea about the political organization of the Harappans. Perhaps the Harappan
rulers were more concerned with commerce that with conquests, and Harappa was possibly ruled
by the a class of merchants. Accroding to Amaur De Riencourt : "All the evidence
points to a high degree of standardization and organization, implying strong centralisation
with full control over production and distribution and probably a high efficient system of
taxation". Evidences, like drainage, town planning, trading items suggests that there was
an organisation like a municipal corporation to look after the civil amenities of the people.
Relation with other Civilizations
The indus valley civilization had a direct contact with many of the contemporary world civilizations: Mesopotamia, Egypt, Turkmenia, Oman and Bahrain. Harappan shells and carnelian beads have been found iin Mesopotamian royal burials, Mesopotamian clay tahlets refer to wood, gold and lapis lazuli coming from Meluha, the ancient Akkadian name for the Indus region. Harrapan Seals and other objects have been excavated in several Mesopotamian cities, such as Sura, Kish, Nippur and Ur. Evidence of a direct relationship between Harappan culture and Egypt in fragmentary and inconclusive. There are evidences of Harappan artfacts, such as etched carnelian beads and ivory, in Bahrain.
Decline and Disappearance
The Harappan culture flourished until about 1800 BC. Afterwards, the culture began to decline. There is no unanimity among historian on the exact reason of the decline of this urban civilization. Different theories of decline have been put forward by different scholars.
The following table gives the important theories and their profounders as regards decline of the Indus culture.
| Decline of Indus Valley |
| Theorists | Reasons of decline |
| Gorden Childe, Stuart Piggot | External Aggression |
| H.T.Lambrick | Unstable river system |
| K.U.R.Kenedy | Natural calamity |
| Orell Stein and A.N. Ghosh | Climate change |
| R. Mprtimer Wheeler | Aryan invasion |
| Robert Raikes | Earthquake |
| Sood and Aggarwal | Dryness of river |
| Walter Fairservis | Ecological imbalance |
|