Unit 3: Indus Valley Civilization

I. Orientation

The Indus Valley Civilization, also called the Harappan Civilization (c. 3300–1300 BCE, with its mature urban phase c. 2600–1900 BCE), was the earliest extensive urban civilization of South Asia. First identified through excavations at Harappa in 1921 and Mohenjo-daro in 1922, it developed across the Indus basin, the Ghaggar-Hakra region, Gujarat, and adjoining areas.

• Terminology: “Harappan” is often preferred because settlements extended far beyond the Indus Valley and Harappa was the first excavated type-site.
• Urban character: Planned settlements, baked-brick structures, drainage systems, craft specialization, standardized weights, seals, and long-distance trade defined the mature phase.
• Major settlements: Harappa, Mohenjo-daro, Dholavira, Ganweriwala, Rakhigarhi, Kalibangan, Lothal, and Banawali were important centres.
• Economic foundation: Agriculture, pastoralism, specialized crafts, internal exchange, and overseas trade supported urban life.
• Written evidence: The civilization used a short, pictographic script on seals, tablets, and pottery, but it remains undeciphered.
• Archaeological basis: Knowledge comes mainly from settlement remains, artefacts, burials, plant and animal remains, and environmental evidence rather than readable historical texts.
• Regional diversity: Shared standards existed alongside differences in architecture, subsistence, pottery, and burial customs.

II. Historical Geography and Development — Space, Time, and Formation

The Harappan civilization was not a single river-valley culture but an extensive network of urban centres, towns, villages, pastoral zones, and resource-producing regions that developed over several archaeological phases.

A. Extent

The civilization occupied a vast and environmentally diverse territory covering much of present-day Pakistan and north-western and western India.

• Overall area: Harappan sites were distributed across approximately 1.2–1.3 million square kilometres, making its geographical reach larger than that of contemporary Egypt or Mesopotamia.
• Western limit: Sutkagen-dor, near the Makran coast in present-day Pakistan, marked the western reach and probably connected inland settlements with maritime routes.
• Eastern limit: Alamgirpur in western Uttar Pradesh represents the easternmost commonly identified Late Harappan settlement.
• Northern limit: Manda, near the Chenab River in Jammu, extended Harappan contacts toward Himalayan forest and mineral resources.
• Southern limit: Harappan cultural material reached Daimabad in Maharashtra, although its precise relationship to the main Harappan tradition remains debated.
• Core regions:
  • Indus system: Harappa and Mohenjo-daro stood near major river routes in Punjab and Sindh.
  • Ghaggar-Hakra region: Kalibangan, Banawali, and numerous smaller settlements occupied this now largely seasonal river system.
  • Gujarat and Kutch: Dholavira, Lothal, Surkotada, and Rangpur linked agriculture, pastoralism, coastal resources, and maritime exchange.
• Settlement hierarchy: Large cities such as Mohenjo-daro coexisted with regional centres, fortified towns, craft settlements, ports, and farming villages.
• Environmental adaptation: Mud brick predominated in some regions, baked brick was important in flood-prone cities, and Dholavira made extensive use of locally available stone and reservoirs.

B. Chronology

Harappan history developed through gradual regional growth, urban integration, and later decentralization rather than through a single sudden rise and fall.

• Pre-Harappan foundations, c. 7000–3300 BCE: Farming communities such as Mehrgarh cultivated wheat and barley, herded animals, produced pottery, and developed craft traditions.
• Early Harappan phase, c. 3300–2600 BCE: Regional cultures expanded, fortified settlements appeared, craft production increased, and pottery styles became more organized.
  • Kot Diji, Amri, and pre-urban levels at Harappa and Kalibangan illustrate this transition.
• Mature Harappan phase, c. 2600–1900 BCE: Cities, standardized weights, seals, writing, drainage, monumental public works, and extensive trade reached their fullest development.
• Late Harappan phase, c. 1900–1300 BCE: Major cities declined, standardized practices weakened, and populations shifted toward smaller rural settlements and eastern or southern regions.
• Regional variation: These dates are approximate because urbanism began and ended at different times in different areas.
• Archaeological dating: Stratigraphy, pottery sequences, radiocarbon dating, and comparison with Mesopotamian records establish the chronology.
• External anchor: Mesopotamian texts refer to trade with Meluhha, generally associated with the Harappan world, especially during the third millennium BCE.

C. Origin

The civilization emerged mainly through the long-term development and interaction of indigenous farming and regional cultural traditions.

• Agricultural roots: Mehrgarh demonstrates settled farming and herding in Baluchistan from about the seventh millennium BCE, providing an early economic foundation.
• Regional antecedents: Kot Diji, Amri, Hakra, Ravi, and Sothi-Siswal traditions contributed pottery, settlement planning, defensive walls, and craft techniques.
• Gradual urbanization: Increasing agricultural surplus, population, interregional exchange, and craft specialization encouraged the growth of towns into cities by c. 2600 BCE.
• Cultural integration: Standardized bricks, weights, seals, and symbols indicate closer communication among previously distinct regional communities.
• External contacts: Trade with Iran, Central Asia, Oman, Bahrain, and Mesopotamia supplied materials and ideas, but the civilization was not simply imported from Mesopotamia.
• Language question: Proposed linguistic affiliations include Dravidian and other language families, but the undeciphered script prevents firm identification.
• Older migration theories: The hypothesis that migrating Sumerians created Harappan civilization lacks archaeological support; its basic development was South Asian and locally rooted.
• Political mechanism: Urban integration may have depended on merchant, ritual, civic, or elite institutions, but no inscriptions identify kings, dynasties, or a single empire.

III. Social and Religious Organization — Life, Authority, and Belief

Harappan social and religious life must be reconstructed cautiously because its script cannot yet be read and many artefacts permit more than one interpretation.

A. Society

Harappan society was urban, occupationally specialized, and socially differentiated, yet its exact political and class structure remains uncertain.

• Urban planning: Gridded streets, covered drains, wells, bathing platforms, and waste facilities at Mohenjo-daro indicate organized civic administration.
• Residential differences: Houses ranged from small dwellings to large multi-room courtyard buildings, suggesting inequalities in wealth or status.
• Occupational specialization: Artisans produced carnelian beads, shell ornaments, faience, pottery, copper tools, bronze objects, seals, and standardized stone weights.
• Agricultural base: Farmers cultivated wheat, barley, pulses, sesame, dates, and regional crops; evidence for millets and rice becomes more prominent in some peripheral and later contexts.
• Animal economy: Cattle, buffalo, sheep, goats, and pigs were kept, while fishing and hunting supplemented food resources.
• Trade networks: Lothal, coastal settlements, Mesopotamian references to Meluhha, and Harappan seals found abroad demonstrate overland and maritime commerce.
• Standards and administration: Cubical weights followed regular ratios, while bricks commonly used the 1:2:4 proportion, implying shared systems of measurement and production.
• Political organization: Citadels and public structures reveal authority, but there are no clearly identified royal palaces, large royal tombs, or victory monuments comparable to Mesopotamia and Egypt.
• Social groups: Farmers, pastoralists, labourers, artisans, traders, administrators, and ritual specialists probably formed interconnected groups rather than an entirely equal society.
• Women and family: Terracotta female figurines and household spaces provide evidence of representation and domestic activity, but they cannot by themselves prove matriarchy or female political dominance.
• Burials: Cemeteries such as Harappa’s Cemetery R-37 contained extended inhumations with modest pottery and ornaments, indicating funerary distinctions without lavish royal graves.

B. Religion

Harappan religion appears to have involved ritual bathing, sacred symbols, animals, plants, and possibly fertility beliefs, but direct continuities with later Hinduism cannot be assumed automatically.

• Ritual bathing: The Great Bath at Mohenjo-daro, a carefully waterproofed brick tank, probably served a communal or ceremonial purpose.
• Female figurines: Numerous terracotta figures have been interpreted as fertility or “mother goddess” images, although some may have been toys or household objects.
• Horned seal figure: A seated figure surrounded by animals on one seal was called “Proto-Shiva” or “Pashupati” by early scholars; its identity remains unproven.
• Animal symbolism: Bulls, elephants, rhinoceroses, tigers, buffaloes, and the so-called unicorn appear frequently on seals, probably carrying social, economic, or sacred meanings.
• Tree symbolism: Representations of the pipal tree and figures associated with vegetation suggest respect for particular plants or natural forces.
• Fire installations: Brick-lined features at Kalibangan and some other sites have been interpreted as ritual fire altars, though their functions may have varied.
• Amulets and figurines: Small tablets, masks, and amulets may reflect household rites, protective practices, or local cults.
• Temple question: No structure has been conclusively identified as a temple; ritual activity may have occurred in homes, public spaces, or multipurpose buildings.
• Treatment of the dead: Extended burial was common, while fractional burial and cremation may also have occurred in particular regions or periods.
• Historical continuity: Bathing, sacred trees, animal imagery, and fertility symbolism resemble later South Asian practices, but similarities do not establish unchanged religious traditions.

IV. Urban Transformation — The End of the Mature Harappan System

After c. 1900 BCE, the integrated urban system fragmented into regional cultures, but Harappan populations and practices did not disappear suddenly.

A. Causes of decline

The decline resulted from interacting environmental, economic, and social pressures rather than one universal catastrophe.

• Climate change: Increasing aridity and weakening monsoon conditions after c. 2200 BCE reduced water reliability and agricultural productivity in vulnerable regions.
• River changes: Shifts in river courses, declining flow in the Ghaggar-Hakra system, and unstable channels disrupted settlements and irrigation possibilities.
• Flooding: Repeated flood deposits at Mohenjo-daro indicate local environmental stress, although flooding cannot explain decline across the entire civilization.
• Trade contraction: Reduced commerce with Mesopotamia and the Persian Gulf weakened urban industries dependent on long-distance exchange.
• Economic decentralization: Standardized weights, seals, script, and specialized crafts became less common, suggesting the breakdown of coordinating institutions.
• Population movement: Communities relocated from major Indus cities toward smaller settlements in Gujarat, Punjab, Haryana, and the upper Ganga-Yamuna region.
• Urban abandonment: Mohenjo-daro and Harappa lost population, while rural farming and regionally distinct pottery traditions became more prominent.
• Invasion theory rejected: The older claim that Indo-Aryan invaders destroyed the cities is unsupported by evidence of widespread warfare or a single destruction horizon.
• Mohenjo-daro skeletons: Scattered human remains once presented as massacre victims came from different contexts and do not demonstrate a final invasion.
• Transformation rather than extinction: Crops, craft practices, settlement traditions, and sections of the population continued within post-urban regional cultures.
• Best explanation: Environmental deterioration, river instability, declining trade, and institutional weakening combined differently across regions, producing a gradual and uneven de-urbanization.