Indus Valley Civilization
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Indus Valley Civilization — Key Facts for SPSC (Sindh)
- Also called the Harappan Civilization — one of the world’s earliest urban civilizations (2600–1900 BCE)
- Major cities: Mohenjo-daro (Sindh) and Harappa (Punjab, Pakistan)
- Known for grid-pattern city planning, advanced drainage systems, and standardized weights and measures
- The script remains undeciphered — one of the world’s great unsolved scripts
- ⚡ Exam tip: Mohenjo-daro layout, archaeological findings, and causes of decline are high-yield for SPSC
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Indus Valley Civilization — SPSC (Sindh) Study Guide
Overview
The Indus Valley Civilization (also called the Harappan Civilization) was one of the earliest and largest Bronze Age urban civilizations in the world. It flourished in the northwestern regions of the Indian subcontinent, primarily in what is now Pakistan and northwest India.
| Parameter | Details |
|---|---|
| Period | 2600–1900 BCE (Mature Phase) |
| Extent | ~1 million km²; largest of the ancient civilizations |
| Major Sites | Mohenjo-daro (Sindh), Harappa (Punjab), Dholavira (Gujarat), Rakhigarhi (Haryana) |
| Peak Population | ~5 million at its height |
Major Cities
Mohenjo-daro (Sindh, Pakistan) — The Crown Jewel
Location: Larkana District, Sindh, Pakistan — on the right bank of the Indus River Excavated: First by Sir John Marshall (1922); major excavations by Sir Mortimer Wheeler (1930s) Meaning: “Mound of the Dead Men” (local name; actual Sindhi name is Chanhudrio)
City Planning:
- Grid pattern: streets laid out in a rectangular grid — remarkable for its time
- Advanced drainage: covered drains running beneath streets; wastewater carried to collection pits outside the city
- Standardized bricks: baked mud bricks (sun-dried bricks) of consistent dimensions (1:2:4 ratio)
- Citadel Mound: raised platform (12–15 m high) with large public buildings (granary, assembly hall, college)
Key Structures:
| Structure | Description |
|---|---|
| The Great Granary | Large rectangular building; likely used for grain storage and redistribution |
| The Assembly Hall | Large pillared hall; possibly for public gatherings |
| The College | Multi-room building; possibly for priests/scribes |
| The Bath (Great Bather) | 12 × 7 m pool (also called the Great Bath) — likely for ritual purification |
| The Lower City | Residential area with standardized house plans; inner courtyards for ventilation |
Population: estimated 30,000–40,000 at its peak
Harappa (Punjab, Pakistan)
- First excavated in 1872 by Alexander Cunningham
- Similar layout to Mohenjo-daro — grid pattern, granary, drainage
- Named after the modern village of Harappa
Dholavira (Gujarat, India)
- Smaller than Mohenjo-daro but well-preserved
- Notable for its water management system
Rakhigarhi (Haryana, India)
- Recently discovered; large urban center
- Predates previously known Harappan cities
Economic System
Trade
Internal Trade:
- River transport on the Indus and its tributaries
- Agricultural surplus from surrounding villages brought to urban centers
- Standardized weights and measures: binary system (1, 2, 4, 8, 16… up to 160 units) — remarkably consistent across the civilization
External Trade:
- Mesopotamia trade (ancient Iraq): exchanged copper, lapis lazuli, carnelian, shell, ivory, gold
- Dilmun (Bahrain): trading hub between Harappan cities and Mesopotamia
- Meluhha (in Mesopotamian texts): possibly the Indus Valley
Exports: cotton textiles (possibly — earliest evidence of cotton cultivation), pottery, terracotta figurines, seals Imports: lapis lazuli from Afghanistan, carnelian from Gujarat, copper from Rajasthan
Weights and Measures
| Unit | Approximate Length | Usage |
|---|---|---|
| Indus inch | ~1.32 cm | Standardized measurement unit |
| Foot | ~30 cm | Architectural measurement |
| Cubit | ~52–53 cm | Larger construction |
The use of standardized brick dimensions and binary weight system suggests centralized administration.
Script and Writing
The Indus Script
- Undeciphered to this day — one of the world’s major unsolved scripts
- ~400–500 signs identified; combining signs (logosyllabic)
- Inscribed on steatite (soapstone) seals and some copper tablets
- Found primarily on seals (rectangular, with an animal motif + script)
Seals
- Steatite (soft stone) carved seals with an animal motif (bull, elephant, rhinoceros, tiger)
- Typically square (1–2 cm); pierced for suspension
- Used for trade identification and possibly ritual purposes
- Most famous seal: Pashupati Seal (from Mohenjo-daro) — depicts a seated figure (possibly Shiva-like deity) surrounded by animals
Society and Culture
Social Structure (Inferred)
- Urban planning suggests a centralized authority (city governors or priests)
- No obvious palaces or temples (unlike Mesopotamia) — suggests relatively egalitarian or collective administration
- Granary indicates surplus management — likely by the state
Religion and Rituals
- Seal motif: some seals depict figures in yogic posture (proto-Shiva/Pashupati)
- Phallic symbols (proto-Shiva lingams) found
- Bath structures suggest ritual purification practices (similar to later Hindu temple practices)
- Terracotta figurines: female figurines (mother goddess cult) — widespread in the civilization
Arts and Crafts
- Terracotta figurines: human and animal figures; high craftsmanship
- Bronze statues: famous “Dancing Girl” from Mohenjo-daro (Bronze Age bronze — 4,500 years old)
- Stone statues: “Priest-King” from Mohenjo-daro (steatite statue; 1.75 m tall)
- Shell, ivory, and faience work: jewelry and decorative items
- Seal carvings: carnelian and steatite
Decline and End of the Civilization
Timeline
- Mature Phase: 2600–1900 BCE
- Overseas interface Period: 1900–1700 BCE (decline in trade; spread of Harappan culture)
- Late Harappan Phase: 1700–1300 BCE (diminishing urban centers; migration eastward)
Theories on Decline
1. Climate Change (Aryan Invasion Theory):
- Later replaced by the Aryan Invasion theory (now largely discredited)
- Current consensus: climate change caused the Ghaggar-Hakra River (paleo-channel of the Indus) to shift or dry up
- Reduced agricultural capacity → population dispersal
2. River Shifts:
- The Saraswati River (Ghaggar Hakra) dried up gradually
- Indus flooding may have affected Mohenjo-daro
3. Disease and Epidemics:
- Some evidence of skeletal remains suggesting disease
4. Aryan Migration (Revised Theory):
- Gradual migration of Indo-Aryan-speaking peoples into the region
- Not a violent conquest — evidence suggests peaceful interaction
- Cultural synthesis with Harappan practices (fire rituals, soma ceremony) — possibly absorbed
Most accepted theory: Multi-factor decline — climate change, river shifts, and ecological degradation causing agricultural collapse and urban abandonment.
Archaeological Sites in Sindh
| Site | Location | Significance |
|---|---|---|
| Mohenjo-daro | Larkana District | Largest Harappan city in Sindh; UNESCO World Heritage |
| Chanhudrio | Larkana District | Small Harappan site near Mohenjo-daro |
| Kot Diji | Khairpur District | Pre-Harappan site; pre-dates Mohenjo-daro |
| Lakes of Larkana region | Larkana | Early settlement sites in the region |
Significance for SPSC Exam
- Mohenjo-daro was excavated by Sir John Marshall (1922) and Sir Mortimer Wheeler (1930s) — both important names
- The Great Bath at Mohenjo-daro is the most iconic Harappan structure
- “Dancing Girl” — bronze statue; 4,500 years old
- “Priest-King” — steatite statue from Mohenjo-daro
- Undeciphered script — remains one of the most important unsolved scripts globally
- The civilization was Bronze Age — copper and bronze tools were used alongside stone tools
Mohenjo-daro: Key Facts for SPSC
| Feature | Detail |
|---|---|
| Discovery | 1922 by Sir John Marshall |
| Location | Larkana District, Sindh |
| Period | 2600–1900 BCE |
| Population (peak) | ~30,000–40,000 |
| Iconic Finds | Dancing Girl (bronze), Priest-King (steatite), Pashupati Seal, Great Bath |
| UNESCO Status | World Heritage Site (1980) — but preservation has been poor |
| Writing | Undeciphered Indus script |
Legacy
- Agricultural techniques from the civilization (crop rotation, irrigation) influenced later South Asian agriculture
- Urban planning principles (grid patterns, drainage) influenced subsequent South Asian city planning
- Cotton cultivation — possibly pioneered in the Indus Valley (the oldest cotton textiles found here)
- Proto-Shiva practices from the civilization influenced later Hindu religious practices
- Seal systems influenced later South Asian administrative traditions
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