The Harappan Civilization (also called the Indus Valley or Indus-Sarasvati Civilization) was a Bronze Age civilization that flourished in the northwestern regions of South Asia from approximately 3300 to 1300 BCE. Recent excavations have pushed its origins back to the 7th–8th millennium BCE at sites like Bhirrana and Mehrgarh, making it one of the world’s oldest continuous cultural traditions.

Chronology

The civilization is conventionally divided into:

  • Pre-Harappan / Early Harappan (c. 7000–3300 BCE): Neolithic and Chalcolithic farming communities at Mehrgarh, Bhirrana, and other sites
  • Early Harappan (c. 3300–2600 BCE): Regionalization era with distinct ceramic traditions
  • Mature Harappan (c. 2600–1900 BCE): Urban phase with standardized weights, writing system, and planned cities
  • Late Harappan (c. 1900–1300 BCE): De-urbanization and transformation phase

Excavations at Bhirrana (Haryana) have yielded the earliest known Harappan levels, dating to the 8th millennium BCE, making it a strong candidate for indigenous development from Neolithic roots.

Major Sites

  • Rakhigarhi (Haryana): One of the five largest Harappan cities, with extensive cemeteries and recent archaeological/anthropological studies
  • Ganweriwala (Punjab, Pakistan): Fifth major urban center, located on the Ghaggar-Hakra bed
  • Kalibangan (Rajasthan): Early Harappan to Mature Harappan, with evidence of fire altars and ploughed fields
  • Dholavira (Gujarat): Unique water management system and inscribed signboard
  • Mohenjo-daro (Sindh): Great Bath, granary, and bronze dancing girl
  • Harappa (Punjab, Pakistan): Type site with extensive cemetery evidence
  • Sanauli (Uttar Pradesh): Late Harappan cemetery with chariot burials and sophisticated copper artifacts

Key Features

  • Urban Planning: Grid layouts, standardized brick sizes, sophisticated drainage systems
  • Economy: Agriculture (wheat, barley, millets, rice), cattle pastoralism, extensive trade networks with Mesopotamia and Central Asia
  • Technology: Copper-bronze metallurgy, stone bead manufacture, seal carving, standardized weights
  • Script: Undeciphered Indus script found on seals, pottery, and signboards
  • Art: Steatite seals with animal motifs, terracotta figurines, bronze sculpture

Decline and Continuity

The decline after 1900 BCE is now understood as a complex transformation rather than a sudden collapse. Climate change (the 4.2 ka BP aridification event), the drying of the Sarasvati River, and shifting trade networks contributed to de-urbanization. Crucially, there is no evidence of invasion or destruction by outside groups — the “Aryan invasion” theory has been firmly rejected by archaeological evidence.

Many cultural features continue into later periods: the fire cult, yogic postures (Proto-Shiva seal), village planning, and craft traditions. The identification between the Harappan and Vedic cultures is increasingly accepted by scholars.