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Indus Valley Civilization — Urban Planning and Society
Overview
The Indus Valley Civilization (IVC), also known as the Harappan Civilization, flourished from approximately 3300 BCE to 1300 BCE. At its peak (2600–1900 BCE), it was the most extensive of the three great early civilizations of the Old World, alongside Mesopotamia and Egypt, covering an area of about 1.3 million sq km — larger than either of its contemporaries.
Chronology
| Phase | Period | Characteristics |
|---|---|---|
| Early Harappan | 3300–2600 BCE | Regional cultures; pre-urban settlements; craft specialization begins |
| Mature Harappan | 2600–1900 BCE | Urban phase; planned cities; peak of trade and technology |
| Late Harappan | 1900–1300 BCE | Decline of cities; shift to rural settlements; regional cultures emerge |
Major Sites
| Site | Location (Modern) | Discovery | Key Features |
|---|---|---|---|
| Harappa | Punjab, Pakistan | 1921 (Daya Ram Sahni) | Granaries, workmen’s quarters, cemetery H |
| Mohenjo-Daro | Sindh, Pakistan | 1922 (R.D. Banerji) | Great Bath, Great Granary, dancing girl, bearded priest |
| Dholavira | Gujarat, India | 1967 (J.P. Joshi) | Water harvesting, signboard, stadium |
| Lothal | Gujarat, India | 1954 (S.R. Rao) | Dockyard, bead factory, terracotta figurines |
| Kalibangan | Rajasthan, India | 1953 (A. Ghosh) | Ploughed field, fire altars, no drainage in pre-Harappan |
| Rakhigarhi | Haryana, India | 1969 | Largest Indian site; DNA evidence of continuity |
| Chanhudaro | Sindh, Pakistan | 1931 (N.G. Majumdar) | Bead-making factory; no citadel |
| Surkotada | Gujarat, India | 1964 (J.P. Joshi) | Horse remains (controversial); stone fortification |
| Banawali | Haryana, India | 1974 (R.S. Bisht) | Radial streets; evidence of both pre-Harappan and Harappan |
| Sutkagendor | Balochistan | 1875 | Westernmost site; near Makran coast |
Town Planning — The Defining Feature
Citadel and Lower Town
Most major Harappan cities were divided into two parts:
- Citadel (west): Raised platform; housed public buildings, granaries, Great Bath
- Lower Town (east): Residential area for common people; grid-pattern streets
Streets and Drainage
- Grid pattern: Main streets running north-south and east-west, intersecting at right angles
- Width: Main streets 9–10 meters wide; side lanes 1.5–3 meters
- Drainage system: Each house connected to street drains through house drains
- Covered drains: Brick-lined, covered with stone slabs; manholes for periodic cleaning
- Sloping: Drains had a gentle gradient to ensure flow
Housing
- Standardized bricks: Burnt bricks of ratio 1:2:4 (length:width:height)
- Size: Houses varied from one-room dwellings to multi-room houses with courtyards
- Bathrooms: Almost every house had a bathroom and well
- Wells: Both public and private wells; Mohenjo-Daro had an estimated 700 wells (one per three houses)
- Entrances: Facing side lanes, not main streets (privacy)
The Great Bath (Mohenjo-Daro)
- A large rectangular tank (12 × 7 × 2.4 meters) made of burnt bricks
- Floor and walls sealed with bitumen (waterproofing)
- Flight of steps at both ends; rooms on three sides
- Surrounded by a pillared corridor
- Scholars interpret it as a ritual bathing facility, possibly for religious purification
- Similar to later Hindu ritual bathing tanks (kunds)
The Great Granary
Harappa: Series of brick platforms with air ducts below for ventilation and protection from moisture Mohenjo-Daro: Massive brick structure (45 × 15 meters) with a central passage
- Indicates centralized food storage and redistribution
- Probably used as a state warehouse to store taxes paid in grain
Economy and Trade
Agriculture
- Crops: Wheat, barley, peas, sesame, dates, mustard, cotton (first to grow cotton)
- Rice husks: Found at Lothal and Rangpur (Gujarat)
- Ploughing: Evidence from Kalibangan (furrow marks)
- Irrigation: Canals at Shortughai (Afghanistan); reliance on floodwaters
Crafts and Industries
| Industry | Raw Material | Centers |
|---|---|---|
| Bead-making | Carnelian, lapis, steatite, shell | Chanhudaro, Lothal |
| Copper/Bronze | Imported from Rajasthan, Balochistan | Harappa, Mohenjo-Daro |
| Shell-working | Marine shells from Gujarat coast | Nageshwar, Balakot |
| Cotton textile | Locally grown cotton | Evidence of spindle whorls |
| Faience | Siliceous paste | Harappa, Mohenjo-Daro |
| Seal-making | Steatite (soapstone) | Major urban centers |
Trade Networks
- Mesopotamia: Extensive trade evidenced by Harappan seals found at Ur, Kish, and other Mesopotamian cities
- Magan (Oman) and Dilmun (Bahrain): Intermediate trading partners
- Central Asia: Lapis lazuli from Badakhshan; tin from Afghanistan
- Imports: Copper from Rajasthan and Oman; gold from Karnataka; silver from Afghanistan
- Exports: Cotton textiles (likely), carnelian beads, ivory, shell objects, timber
- Meluhha: The name used in Mesopotamian texts for the Indus region
Seals and Script
Seals
- Usually square or rectangular (2–5 cm) made of steatite
- Depict animals: unicorn (most common), humped bull, elephant, rhinoceros, tiger, buffalo, goat
- Pashupati seal: A figure seated in yogic posture surrounded by animals — often interpreted as proto-Shiva
- Seals were probably used for trade authentication and as identity markers
Script
- The Harappan script remains undeciphered
- Written from right to left (boustrophedon in longer inscriptions)
- About 400–600 distinct signs (logographic-syllabic)
- No bilingual inscription has been found
- Attempts to link it with Dravidian or Sanskrit continue
Religion and Beliefs
| Evidence | Interpretation |
|---|---|
| Pashupati seal | Proto-Shiva as lord of animals |
| Terracotta female figurines | Mother goddess worship |
| Great Bath | Ritual purification |
| Fire altars (Kalibangan, Lothal) | Fire worship |
| Tree worship | Peepal tree depicted on seals |
| Swastika | Auspicious symbol found on seals |
| Burial practices | Extended burials with grave goods; belief in afterlife |
| Phallic stones | Proto-Shiva lingam |
Decline of the Indus Valley Civilization
No single theory adequately explains the decline. Contributing factors likely include:
Environmental Factors
- Climate change: Weakening of the monsoon; increased aridity
- Floods: Repeated flooding at Mohenjo-Daro (more than 7 times)
- River course changes: The Ghaggar-Hakra (often identified with the Rigvedic Saraswati) dried up around 1900 BCE
- Tectonic activity: Earthquakes may have altered river courses
Socio-Economic Factors
- Decline in trade with Mesopotamia after ~1900 BCE
- Over-exploitation of resources (deforestation for brick-making)
- Breakdown of centralized authority and urban administration
Migration Theory
- The long-debated “Aryan invasion” theory has been largely replaced by migration and acculturation models
- Genetic evidence from Rakhigarhi shows continuity between Harappan and later Indian populations
- The Late Harappan culture transitioned into regional cultures (Cemetery H in Punjab, Jhukar in Sindh, Rangpur in Gujarat)
Legacy
The Indus Valley Civilization’s contributions:
- Urban planning: First planned cities in the subcontinent
- Sanitation: Sophisticated drainage and water management
- Standardization: Weights, measures, and brick sizes
- Craft traditions: Bead-making and metallurgy that continued into later periods
- Agricultural innovations: Cotton cultivation, crop rotation
- Cultural continuities: Elements seen in later Hinduism (ritual bathing, fire worship, yogic postures)