Indus Valley Civilisation
In the Balochistan province of Pakistan, a Neolithic site named Mehrgarh emerged around 7000 BCE. This mountain settlement provided new insights into how farming and herding began in South Asia. Archaeologists found evidence of domesticated wheat varieties and early phases of pottery making that linked the region to Near Eastern cultures. Jean-François Jarrige argued for an independent origin of Mehrgarh rather than viewing it as a backwater of the Neolithic culture from the East. The people there used domesticated wheats and barley while also developing local crops like naked six-row barley. Cattle herding appeared at this site around 5000 years before present, marking the earliest known use of complex multi-cropping strategies across seasons. Farmers grew foods during summer including rice millets and beans while winter brought wheat barley and pulses requiring different watering regimes. A small amount of wheat suggested possible Near-Eastern origins but most crops were locally developed. The transition from rural villages to urban centers began when farmers moved from mountains into lowland river valleys. By 2600 BCE these communities had transformed into large urban centers setting the stage for the mature Harappan phase.
The city of Mohenjo-daro covered more than 250 hectares within the lower Indus plain. Its architecture included world-first known city sanitation systems with covered drains lining major streets. Individual homes or groups obtained water from wells while waste water was directed to these drainage networks. Houses opened only to inner courtyards and smaller lanes creating a unique urban layout. Granaries warehouses brick platforms and massive protective walls formed the core infrastructure. These walls likely served both as flood defenses and fortifications though their exact purpose remains debated. No large monumental structures like palaces or temples were built unlike contemporary Mesopotamia or Egypt. Some structures functioned as granaries while others may have been public baths such as the Great Bath at Mohenjo-daro. All houses had access to water and drainage facilities suggesting relative egalitarianism in wealth distribution. Cities developed elaborate drainage and sewerage systems described by archaeologists as well-planned compared to many societies of that era. The high degree of forward-looking planning demonstrated organized local governments capable of executing large-scale development programs. Most city dwellers appear to have been traders or artisans living with others pursuing similar occupations in defined neighborhoods.
Charles Masson a deserter from the East India Company's army traveled through Punjab in 1829 gathering intelligence for the Company. He made copious notes and illustrations of Harappa's rich historical artifacts lying half-buried in the ground. In 1842 Masson included his observations of Harappa in the book Narrative of Various Journeys in Baluchistan Afghanistan and the Punjab. Two years later Alexander Burnes stopped at Harappa noting baked bricks employed in ancient masonry but also haphazard plundering by locals. After British annexation of Punjab in 1848-49 the site was raided perilously for its bricks used as track ballast for railway lines laid between Multan and Lahore in the mid-1850s. The Archaeological Survey of India formed in 1861 marked formal organization of archaeology on the subcontinent. Alexander Cunningham visited Harappa again in 1875 interpreting an unknown script found on stamp seals. John Marshall directed ASI excavations starting in the 1920s after Lord Curzon pushed through Ancient Monuments Preservation Act 1904. Daya Ram Sahni excavated two mounds at Harappa while R.D. Banerji surveyed Mohenjo-daro in 1919-1920 and 1922-1923. On the 24th of September 1924 Marshall made a public intimation in Illustrated London News declaring they were on threshold of discovering a long forgotten civilization. Systematic excavations began in Mohenjo-daro in 1924-25 continuing with H. Hargreaves Ernest J.H. Mackay and later Mortimer Wheeler appointed director-general in 1944.
An extensive canal network used for irrigation has been discovered by H.-P. Francfort across the region. During Early Harappan period about 3200 to 2600 BCE intensive caravan trade connected Central Asia and Iranian plateau. Maritime trade networks operated between Harappan and Mesopotamian civilizations as early as middle Harappan Phase. Middlemen merchants from Dilmun modern Bahrain Eastern Arabia and Failaka handled much commerce via Persian Gulf routes. Plank-built watercraft equipped with single central mast supporting sail woven rushes or cloth enabled sea-borne trade. Evidence suggests Indus-type artifacts reached Oman peninsula Bahrain southern Mesopotamia and even Nile River valley Anatolia Caucasus. Etched carnelian beads Harappan-style cubical stone weights and cylinder seals found at Susa indicate maritime trade in late third millennium BCE. Studies of tooth enamel from individuals buried at Harappa suggest some residents migrated from beyond Indus Valley. Ancient DNA studies identified eleven individuals of South Asian descent at Bronze Age sites Gonur Depe Turkmenistan and Shahr-e Sukhteh Iran. Entrepreneurs from Indus Valley regularly ventured into regions to transact with local socioeconomic entities. Specific products were proactively designed manufactured to fulfill foreign market needs while craftspeople adapted distinctive productions to taste of elites.
Between four hundred and six hundred distinct Indus symbols have been found on stamp seals small tablets ceramic pots and over dozen other materials including signboard hanging over gate of inner citadel at Dholavira. Typical inscriptions around five characters long longest on copper plate reaching thirty-four symbols. Computer scientists comparing pattern to linguistic scripts found Indus script closer to spoken words supporting hypothesis coding unknown language. Messages proved too short to be decoded by computer each seal having distinctive combination symbols insufficient context for meaning derivation. Symbols accompanying images vary making impossible derive meaning from images themselves. No parallels known to these mass-produced inscriptions in any other early ancient civilization. Some scholars argue system did not encode language but similar variety non-linguistic sign systems used extensively Near East symbolizing families clans gods religious concepts. Others claim symbols exclusively used economic transactions leaving unexplained appearance ritual objects mass-produced molds. Finnish Indologist Asko Parpola concludes uniformity precludes possibility widely different languages being used suggesting early form Dravidian language must have been language of people. Today Dravidian family concentrated mostly southern India northern eastern Sri Lanka pockets remaining throughout rest India Pakistan Brahui language lending credence theory.
Archaeological records provide no immediate answers regarding who ruled Harappan cities how governance functioned. Complex decisions taken large-scale mobilization resources demonstrated existence planning authority through highly uniform well-planned grid patterns divided into two levels ground making one part slightly higher than other. Remarkable consistency weights measures evident pottery seals weights bricks indicates central authority able make definitive regulations. Copper abundant at sites revealed regional patterns detailed technological aspects bronze production covering timeline 3300 to 1700 BCE. Production increased especially starting Kot Diji Phase Early Harappan groups already well acquainted copper metallurgy. Major sources included Rajasthan Khetri mines as far Oman Bahrain Aravalli Range northwestern India particularly important. Access copper bronze relatively widespread throughout society contrary older ideas elite control over metal production. Diet dominated meats animals such cattle buffalo goat pig chicken remnants dairy products discovered. Seven food-balls laddus found intact form along with figurines bulls hand-held copper adze during excavations western Rajasthan dated about 2600 BCE likely composed legumes primarily mung cereals. Crafts including shell working ceramics agate glazed steatite bead making practiced pieces used necklaces bangles ornaments all phases culture.
Around 1900 BCE signs gradual decline began emerging by around 1700 BCE most cities abandoned. Examination human skeletons site Harappa 2010s demonstrated end Indus civilization saw increase interpersonal violence infectious diseases leprosy tuberculosis. General picture presented late Harappan phase breakdown urban networks expansion rural ones. Climate change possibly due abrupt critical mega-drought cooling four thousand years ago marks onset Meghalayan Age present stage Holocene. Ghaggar-Hakra system rain-fed water-supply depended monsoons grew significantly cooler drier from about 1800 BCE linked general weakening monsoon time. Indian monsoon declined aridity increased Ghaggar-Hakra retracting reach towards foothills Himalaya leading erratic less extensive floods inundation agriculture less sustainable. Aridification reduced water supply enough cause civilisation demise scatter population eastward. Residents migrated towards Ganges basin east establishing smaller villages isolated farms small surplus produced communities did not allow development trade cities died out. Formerly typical artifacts stone weights female figurines became rare circular stamp seals geometric designs lacking Indus script characterised mature phase. Urban amenities drains public bath no longer maintained newer buildings poorly constructed stone sculptures deliberately vandalised valuables sometimes concealed hoards suggesting unrest corpses animals even humans left unburied streets abandoned buildings.
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Common questions
When did the Indus Valley Civilisation begin and where was its earliest site located?
The Neolithic site named Mehrgarh emerged in Balochistan province of Pakistan around 7000 BCE. This mountain settlement provided new insights into how farming and herding began in South Asia before communities transformed into large urban centers by 2600 BCE.
What were the key features of Mohenjo-daro city planning and infrastructure during the mature Harappan phase?
Mohenjo-daro covered more than 250 hectares within the lower Indus plain and featured world-first known city sanitation systems with covered drains lining major streets. Individual homes obtained water from wells while waste water was directed to these drainage networks, creating a unique urban layout that opened only to inner courtyards and smaller lanes.
Who discovered the ruins of Harappa and when did systematic excavations officially begin?
Charles Masson traveled through Punjab in 1829 gathering intelligence for the East India Company and made notes on Harappa's artifacts lying half-buried in the ground. Systematic excavations began at Mohenjo-daro in 1924-25 after John Marshall directed ASI excavations starting in the 1920s following Lord Curzon's Ancient Monuments Preservation Act 1904.
How far did maritime trade networks extend from the Indus Valley Civilisation during the Bronze Age?
Maritime trade networks operated between Harappan and Mesopotamian civilizations as early as middle Harappan Phase with evidence reaching Oman peninsula Bahrain southern Mesopotamia and even Nile River valley Anatolia Caucasus. Plank-built watercraft equipped with single central mast supporting sail woven rushes or cloth enabled sea-borne trade handled by merchants from Dilmun modern Bahrain Eastern Arabia and Failaka via Persian Gulf routes.
What is the current understanding of the undeciphered Indus script and its possible linguistic origins?
Between four hundred and six hundred distinct Indus symbols have been found on stamp seals small tablets ceramic pots and over dozen other materials including signboard hanging over gate of inner citadel at Dholavira. Finnish Indologist Asko Parpola concludes uniformity precludes possibility widely different languages being used suggesting early form Dravidian language must have been language of people.
Why did the Indus Valley Civilisation decline around 1700 BCE and what caused population migration?
Around 1900 BCE signs gradual decline began emerging by around 1700 BCE most cities abandoned due to climate change possibly due abrupt critical mega-drought cooling four thousand years ago marks onset Meghalayan Age present stage Holocene. Ghaggar-Hakra system rain-fed water-supply depended monsoons grew significantly cooler drier from about 1800 BCE linked general weakening monsoon time leading aridification that reduced water supply enough cause civilisation demise scatter population eastward toward Ganges basin.