In 1856, two British engineers — John and William Brunton — were laying a railway line through Punjab for the East India Company and needed ballast. Local workers led them to a vast mound of unusually hard, uniform bricks near a village called Harappa. The engineers used thousands of those bricks to stabilise 160 kilometres of railway track. They had no way of knowing they were quarrying the remains of a city that had been planned, built, and inhabited for centuries three thousand years before Christ — the material ruin of a civilisation that would not be recognised for another sixty-five years.
Before Archaeology: The Long Sleep
The mound at Harappa was not entirely unknown before modern archaeology. Charles Masson, an English traveller and amateur archaeologist (who had deserted from the East India Company army), described the site in his 1826 travel memoir and again in an 1842 publication. He noted "brick ruins" and speculated about a medieval city but could not identify the site's antiquity. Alexander Cunningham, the first Director-General of the Archaeological Survey of India (ASI), visited Harappa in 1853 and again in 1873. He collected Harappan seals but could not read them or understand their significance, cataloguing them simply as curiosities from an unknown source.
The crucial problem was that nobody looking at the IVC ruins in the 19th century could imagine they were looking at a civilisation of comparable antiquity and sophistication to Egypt or Mesopotamia. The prevailing assumption was that India's documented history began with the Vedic age and that anything pre-Vedic was too primitive to have produced cities. The physical evidence — fired bricks, drainage channels, standardised weights — was literally in front of investigators for decades before anyone grasped its meaning.
Discovery and Excavation History
The systematic discovery began in 1920–21 when John Marshall, then Director-General of ASI, directed excavations at multiple sites. At Harappa in Punjab (now Pakistan), Rai Bahadur Daya Ram Sahni led the first scientific excavation in 1921 and identified a distinct pre-historic cultural layer. Simultaneously, at Mohenjo-daro ("Mound of the Dead") in Larkana district, Sindh (now Pakistan), R.D. Banerji began excavations in 1922. Banerji had initially gone to Mohenjo-daro looking for a Buddhist stupa — instead he found something far older beneath it.
Mortimer Wheeler, who became DG of ASI in 1944, brought rigorous stratigraphic excavation methods to Harappa in 1944–45 and transformed understanding of the site's layering and chronology. Wheeler famously (and controversially) argued that the IVC was destroyed by "Aryan invaders" — a theory now largely discredited. After Partition in 1947, the major sites of Harappa and Mohenjo-daro fell in Pakistan, and India's excavation efforts focussed on Lothal, Kalibangan, Rakhigarhi, and other Indian sites.
| Excavator | Site | Year | Role / Significance |
|---|---|---|---|
| Daya Ram Sahni | Harappa | 1921 | First systematic excavation of an IVC site; under Marshall's direction |
| R.D. Banerji | Mohenjo-daro | 1922 | Identified pre-historic (not Buddhist) layer; named the site |
| John Marshall | Both (supervisor) | 1924 | Announced discovery; coined "Indus Valley Civilisation" |
| Mortimer Wheeler | Harappa | 1944–45 | Introduced stratigraphic methods; argued (incorrectly) for Aryan-invasion destruction |
| S.R. Rao | Lothal | 1955–62 | Excavated the major IVC site in Gujarat; identified dockyard |
| B.B. Lal | Kalibangan | 1960s | Excavated Rajasthan IVC site; found pre-Harappan ploughed field |
Consider the following pairs:
Sites of Harappan Civilisation — Location (present-day)
- Chanhu-daro — Sindh (Pakistan)
- Dholavira — Gujarat (India)
- Rakhigarhi — Haryana (India)
How many of the above pairs are correctly matched?
Geographical Extent and Key Sites
At its mature phase, the Harappan Civilisation covered approximately 1.25 million square kilometres — larger than ancient Egypt and Mesopotamia combined — making it the most extensive of the four great Bronze Age civilisations (the others being Mesopotamia/Sumerian, Egypt, and China's Yellow River civilisation). It occupied the floodplains of the Indus river system and the now-dry bed of the ancient Saraswati (Ghaggar-Hakra) river — the latter was once a major river that has since dried up, and a significant number of IVC sites lie along its former course.
The civilisation's key boundary markers — all tested by UPSC — are: easternmost site: Alamgirpur (Meerut district, Uttar Pradesh); northernmost site: Manda (Akhnoor, Jammu, J&K); southernmost site: Daimabad (Ahmednagar, Maharashtra); westernmost site: Sutkagendor (Balochistan, Pakistan, on the Makran coast). The total number of identified sites now exceeds 2,000, with the majority in India (particularly in Gujarat, Haryana, and Rajasthan).
The two original "capital" sites remain Harappa (Montgomery/Sahiwal district, Punjab, Pakistan) and Mohenjo-daro (Larkana district, Sindh, Pakistan), each approximately 400 hectares. However, Rakhigarhi in Haryana, India — now under ongoing excavation — has been identified as potentially the single largest IVC site at approximately 350+ hectares across multiple mounds, challenging Mohenjo-daro's former claim to largest-site status. The article on important IVC sites covers Lothal, Dholavira, Kalibangan, and Rakhigarhi in detail.
Three Phases of the Harappan Civilisation
Scholars divide Harappan history into three phases. The Early Harappan phase (c. 3300–2600 BCE) is the pre-urban, village stage. Key sites of this period include Mehrgarh (Balochistan, Pakistan) — the most important of all, showing agriculture (wheat, barley), mud-brick houses, and early craft production from as early as 7000 BCE — and proto-urban sites like Kot Diji and Amri in Pakistan. These sites demonstrate the gradual development of the material culture that would culminate in the mature cities.
The Mature Harappan phase (c. 2600–1900 BCE) is the subject of almost every UPSC question about the IVC. This is the period of planned grid cities, the Great Bath, standardised weights and measures, the Harappan script, and long-distance trade with Mesopotamia. The civilisation at its peak is estimated to have had a population of five million people — a substantial proportion of the world's total population at the time. The urban planning and architecture of this phase is the subject of the next article in this series.
The Late Harappan phase (c. 1900–1300 BCE) is the decline and dispersal period. Major cities were abandoned; population moved eastward toward the Gangetic plain and southward toward Gujarat and Maharashtra. The material culture became simpler — the script disappeared, standardised weights vanished, and the distinctive Harappan pottery style fragmented into regional variants. The famous Cemetery H culture at Harappa represents a transitional Late Harappan population.
Consider the following statements about the Indus Valley Civilisation:
- It was predominantly a secular civilisation and the religious element, though present, did not dominate the scene.
- During this period, cotton was used for manufacturing textiles in India.
- The script of the Indus Valley people has been deciphered.
Which of the statements given above is/are correct?
The Nomenclature Debate
The civilisation goes by several names, each with different scholarly and political connotations. "Indus Valley Civilisation" (IVC) — coined by John Marshall — is the traditional name, derived from the Indus river, but it is misleading because a large proportion of sites are not in the Indus valley at all: they lie along the Ghaggar-Hakra river system in Haryana, Rajasthan, and Gujarat.
"Harappan Civilisation" is now the preferred term in academic literature because Harappa was the first discovered site. Archaeologists further use "Early Harappan," "Mature Harappan," and "Late Harappan" as the standard phase designations. The term "Saraswati-Sindhu Civilisation" has been promoted particularly in Indian nationalist academic circles on the grounds that many sites lie along the ancient Saraswati river (identified with the Ghaggar-Hakra) rather than the Indus (Sindhu). This name carries political weight in debates about the Aryan migration/invasion question and the identity of the civilisation's people.
For UPSC, all three names refer to the same civilisation. The exam typically uses "Indus Valley Civilisation" or "Harappan Civilisation" interchangeably, and the distinction between them has not been the subject of a direct PYQ. The undeciphered script means we do not know what the people called themselves.
Global Context: The Four Bronze Age Civilisations
The Harappan Civilisation is one of four great Bronze Age river-valley civilisations that developed roughly contemporaneously: Mesopotamia (Tigris-Euphrates, modern Iraq), Egypt (Nile), IVC (Indus-Ghaggar-Hakra), and China (Yellow River/Huang He). Of the four, the IVC was the largest by area. It was in contact with Mesopotamia through maritime trade — Sumerian texts refer to a land called "Meluhha" from which they received carnelian beads, ivory, and timber, and this is now generally identified with the IVC.
One significant characteristic that distinguishes the IVC from Egypt and Mesopotamia is the near-complete absence of monumental royal or religious architecture. Egypt and Mesopotamia both produced enormous temples (ziggurats, pyramids) and royal palaces — built by centralised states with coercive labour. The IVC produced the Great Bath, well-planned streets, and elaborate drainage, but no pyramid, no ziggurat, and no identifiable palace. This has led scholars to debate whether the IVC was organised as a theocracy, a network of merchant oligarchies, or something else entirely. The question connects directly to the town planning and social organisation of the mature cities.
Exam Takeaway UPSC's favourite traps for this article: (1) Marshall announced the discovery but Sahni (Harappa) and Banerji (Mohenjo-daro) did the excavations — never confuse announcer with excavator; (2) the IVC script is NOT deciphered — this is tested repeatedly; (3) the IVC was the LARGEST Bronze Age civilisation by area, not just one of four comparable-sized ones; (4) cotton was grown and used first by the IVC — the world's first confirmed cotton textile users; (5) Rakhigarhi is the largest IVC site IN INDIA; Mohenjo-daro and Harappa are in Pakistan; (6) the southernmost site is Daimabad (Maharashtra), not somewhere in Gujarat.