Indus Valley Civilization 🏛️

01Introduction, Classification & Chronology 📜

The Indus Valley Civilization (IVC), also formally known as the Harappan Civilization (because Harappa was the first excavated site), is one of the world's earliest major urban settlements.

Geographical Naming: Historically called IVC, it is most appropriately termed the Indus-Saraswati Civilization, as roughly 80% of its settlements were concentrated along the dried-up Indus-Saraswati river valleys. The Harappa-Ghaggar-Mohenjodaro axis is considered the heartland of the civilization.

Era Classification: It belongs to the Proto-Historic Period (Chalcolithic Age / Bronze Age).

Chronology (Carbon-14 Dating): The most universally accepted timeframe is 2500 BC to 1750 BC. It is systematically divided into three evolutionary phases:

• Early Harappan Phase: 3000–2600 BCE (Sites: Damb Sadaat, Kot Diji, Amri Nal, Siswal)
• Mature Harappan Phase: 2600–1900 BCE (Major Urbanization Phase)
• Late Harappan Phase: 1900–1700 BCE (De-urbanization Phase; Sites: Jhukar, Amri, Ahar, Rangpur)

Key Discoveries & Personalities

• John Marshall (Director of ASI) was the first scholar to coin the term 'Indus Civilization'.
• Alexander Cunningham: First Chairman of the ASI and known as the Father of Indian Archaeology. He excavated Harappa early on but could not recognize its historical significance at the time.
• Debala Mitra: 1st Woman Director of ASI.
• Dayaram Sahni: Discovered Harappa in 1921.
• Rakhal Das Banerjee: Discovered Mohenjodaro in 1922.

02Geographical Extent & Boundaries 🗺️

The civilization was vastly spread over modern-day Sindh, Baluchistan, Punjab, Haryana, Rajasthan, Gujarat, Western U.P., and Northern Maharashtra. Most of the post-independence Harappan sites in India are found in the state of Gujarat.

• Northern-most site: Manda (Jammu & Kashmir, on the river Chenab)
• Southern-most site: Daimabad (Maharashtra, on the river Pravara) — earlier considered Bhagatrav (Kim River, Gujarat)
• Eastern-most site: Alamgirpur (Uttar Pradesh, on the river Hindon)
• Western-most site: Sutkagendor (Pakistan-Iran Border, Makran Coast, on the river Dashk)

03Advanced Town Planning & Architecture 🧱

The defining feature of the IVC was its remarkably advanced and uniform urban planning.

• Grid System: Roads and streets were laid out in a grid pattern, intersecting at exactly 90-degree right angles.
• Construction Material: Unprecedented use of burnt (baked) bricks, utilizing a standardized ratio of 1:2:4.
• Underground Drainage System: Every house had its own bathroom, drains connected to street drains, sumps/cesspits trapped solid waste, and street drains were covered with limestone slabs.
• Bipartite City Division:
  • Citadel / Acropolis: Smaller, built on an artificially raised platform, walled, housed special public buildings.
  • Lower Town: Larger, situated lower, also walled, meant for residential buildings of common people.

04Agriculture & Animal Domestication 🌾🐫

Major Crops: Wheat and Barley were staple crops. Others included dates, mustard, sesamum, lentil, chickpea, garlic, and millets.

Cotton Revolution: The Indus people were the first in the world to produce cotton. The ancient Greeks called it 'Sindon' (from Sindh).

Agricultural Technology: A deeply ploughed field with two sets of furrows at right angles (suggesting mixed cropping) was discovered at Kalibangan (Pre-Harappan phase). Terracotta plough models found at Cholistan and Banawali.

Animal Husbandry: Domesticated: sheep, goat, humped and humpless bull, buffalo, boar, dog, pig, fowl, deer, tortoise, camel, elephant. Bones of wild boar, gharial, and deer indicate hunting.

05Economy, Trade & Commerce 🚢

An urban economy dominated by a presumed ruling authority of merchants, with thriving inland and foreign trade.

Weights and Measures: Exchange regulated by a precise system of uniform weights, mostly of a stone called 'Chert' (mass-produced at Sukkur and Rohri hills, Pakistan). Lower denominations were Binary (1,2,4,8,16…); higher denominations were Decimal (multiples of 16).

Currency: No evidence of metallic coins — the Barter system was standard.

Foreign Trade (Mesopotamia): Sumerian texts mention trade with 'Meluha' (ancient name for the Indus region), via two intermediate stations: Dilmun (Bahrain) and Makan (Makran Coast). Harappan seals excavated at Susa and Ur. Shortugai and Mundigaq in Afghanistan served as Indus trading outposts.

Important Ports: Lothal (ancient brick dockyard), Sutkagendor, Allahdino, Balakot, Kuntasi.

06Religion, Script, Burials & Society 🕉️📝

Religious Practices (No Temples): Inferred from terracotta figurines and steatite seals.

• Mother Goddess (Matridevi/Shakti): Most common figurine — a plant growing out of a woman's embryo (Earth Goddess).
• Pashupati Mahadeva (Proto-Shiva): Chief male deity, seated yogic posture, surrounded by four animals (Elephant, Tiger, Rhino, Buffalo) and two Deer at his feet.
• Animism & Phallic Worship: Lingam and Yoni worship; widespread Zoolatry (humpless bull, mythical unicorn) and tree worship (Peepal).
• Swastika: Its origin is directly traced to the Indus Civilization.

The Indus Script: Pictographic, ~26 signs, mostly short inscriptions on steatite seals. NOT yet deciphered. Overlapping letters on Kalibangan potsherds show writing was Boustrophedon (right-to-left, then left-to-right, alternating lines).

Pottery: Red or Black pottery (Ochre-coloured, Black-Red ware, Painted-Grey ware).

Burial Practices: Inhumation was most common; graves held pottery, ornaments, copper mirrors.

• Ropar: Burial of dog with its human master.
• Lothal: Double Burial (male and female in a single grave).
• Sanauli (UP): Extended burials.
• Surkotada: Pot burials and oval graves.

07Theories of Decline 📉

The decline of the Harappan civilization around 1750 BC is highly debated:

• Aryan Invasion: Wheeler, Gordon, Childe — Wheeler accused the Rigvedic god 'Indra' (Purandara) of destroying IVC forts; Rigveda mentions a battle at 'Hariyumpia', identified with Harappa.
• Ecological Disturbance / Deforestation: Fairservice.
• Change in River Course: Dales and M.S. Vatsa.
• Low Rainfall / Climate Change: Stein.
• Massive Floods: Mackey and S.R. Rao.
• Drying of Ghaggar River: D.P. Agrawal and Sood.
• Earthquake: Raikes and Dales.

08Major Harappan Sites 🏛️

09Quick Revision Table ⚡

10Rapid Fire Practice Check 🎯