Archeological discovery:
- Expedition led by Marshall and R D Banerji
Theories on Origin of Harappan Civilization:
- Mortimes Wheeler in 1968: Civilization came from outside, most probably Mesopotamia. Rejected
Chronological Evolution:
This graph illustrates the possible evolution of the Indus Valley civilization.

Timeline for evolution of the Indus Valley Civilization
Period of existence of the Indus Valley Civilization:
2800/2900 BC to 1800 BC
Geographical Extent:
At that time, North-west India were not deserts. They had a hot, humid climate.
Major areas:
- Sind
- Baluchistan
- Kathiawar
- Punjab
- northern Rajasthan
- Gujurat
There were a few far away places that had centres of the Indus Valley Civilization. These were most probably trade centres. Ex:
- Shartughai (Afghanistan)
- Surakotada (Gujurat)
Important Centres
- Harappa
- Mohenjodaro
- Kalibagan
- Lothal
- Sutkagen-Dor
Location: Bank of Ravi
Occupation:Administration, trade, craft, religion
- Premier city
- Located on trade routes to Central Asia, Afghanistan, Jammu
Location: Bank of Indus
Population: 35,000 (largest city)
- Houses were built and re built on top of older ones
- Faced regular floods
Location: Bed of river Ghaggar
- Largest concentration of population
- Evidence of early Harappan period
Location: Coastal flats of Gulf of Cambay
-> Outpost for sea trade
-> Dockyard has been discovered
Location: Makran coast. On the Pakistan-Iran border
-> Landlocked, dry plains
-> Citadel surrounded by walls.