The traders who sold cotton to Mesopotamia, and the mystery of their disappearance

The Harappans grew the world's first cotton, shipped it to Mesopotamia, and paid in standardized weights, then, around 1900 BCE, their cities quietly emptied. No invasion, no single catastrophe: just rivers that shifted, rains that failed, and traders who moved on. This is the story of how the civilization lived, traded, worshipped, and faded.

Feeding the cities: agriculture and animals

Harappan agriculture was diverse and productive. The staple crops were wheat and barley, supplemented by rice, millets, lentils, chickpeas, and sesame. A wooden ploughshare was used to till fields, the ploughed field at Kalibangan is the direct archaeological proof. The Harappans were also the earliest producers of cotton, which the Greeks later knew as Sindon.

Irrigation was managed by harnessing river floods and building canals and reservoirs, traces of canals have been found at Shortugai in Afghanistan, and Dholavira's elaborate water-conservation system shows the same engineering instinct applied at the city scale.

Animal husbandry was equally developed. The Harappans domesticated oxen, buffaloes, goats, sheep, pigs, dogs, cats, asses, humped bulls, and camels; elephants and rhinoceroses were known to them, appearing in their art.

Fill in the crop list the way prelims asks it: alongside wheat and barley the Harappans grew mustard, peas, lentils, sesame and dates, and Gujarat sites add millets and rice. A terracotta plough model from Banawali in Haryana shows the implement that matched the Kalibangan furrows, evidence that plough agriculture was ordinary practice, not a one-site oddity. Behind the crops sat a raw-material network that functioned like a supply chain: copper from the Khetri mines of Rajasthan, gold washed in the Kolar region of Karnataka, and steatite cut in south Gujarat for the seal workshops.

The Meluha trade: merchants of the Bronze Age world

Trade was the civilization's lifeblood, and it was strikingly modern in organization. Weights and measures were standardized across the Harappan world, and seals, mostly steatite, engraved with the undeciphered script and animal motifs like the unicorn, bull, and rhinoceros, were used for trade authentication and record-keeping.

The foreign network was extensive. Mesopotamian texts refer to the Indus region as Meluha, with Dilmun (modern Bahrain) and Makan (the Makran coast) serving as intermediate trading stations. Exports included grain, jewelry, and pottery; imports were mainly copper and precious stones. The raw-material map is a Prelims favourite: lapis lazuli from Shortugai (Afghanistan), steatite from South Rajasthan, copper from Rajasthan and Oman, and carnelian and shell worked at Chanhudaro and Lothal, the great bead-making centres.

Read the trade as a balance sheet. Meluhha exported cotton cloth, timber, ivory, carnelian beads and peacocks; it imported silver, tin and lapis lazuli. The runs went through two Gulf intermediaries named in Mesopotamian texts: Dilmun, identified with Bahrain, and Makkan, identified with Oman. Harappan merchants also planted an outpost at Shortughai in north-east Afghanistan, best read as a lapis lazuli colony sitting beside the Badakhshan mines. More than 2,000 steatite seals survive; the unicorn is the commonest creature on them, followed by the zebu, and they worked as ownership stamps pressed into clay sealings on bales and jars.

The Harappan trade network

Craft production matched the trade. Chanhudaro is the tell: a city with no citadel, given over to craft and cosmetics, where workshops turned out shell bangles, beads and even lipstick and kohl (collyrium, eye cosmetic) sticks with cinnabar pigment. Lothal and Chanhudaro both ran bead factories. Everyday life shows in the small finds: terracotta wheeled toy carts, dice and board-game pieces, and pottery such as Black-and-Red painted ware decorated with intersecting circles, pipal leaves and fish-scale patterns, alongside perforated jars whose use is still argued over.

Who ran the show? Society without kings

One of the Harappan civilization's great puzzles is its politics. Unlike Egypt with its pharaohs or Mesopotamia with its kings, the Harappan world has yielded no palaces, no royal tombs, no grand temples, and no temples at all have been found at any Harappan site. The citadel-lower town division suggests some hierarchy, but the uniformity of bricks, weights, and town plans across 2,000 sites points to collective coordination rather than a single monarch.

Religion was nature-centred: the Pashupati seal from Mohenjo-daro shows a three-faced figure in a yogic posture surrounded by animals, interpreted as a proto-Shiva; the Mother Goddess appears in terracotta figurines; pipal trees, animals, and lingam symbols were revered.

Who held power is a model, not a fact. One influential reading, associated with A. L. Basham’s generation, pictures a merchant oligarchy or municipal corporation running the cities; rival models propose priest-kings, a kingless corporate order, or competing heterarchies. No palace or temple has been decisively identified, so treat every Harappan government statement in the exam as a scholarly position with attribution. The same caution applies to the skeletal record: early excavators sorted Harappan skeletons into racial types, but those physical-anthropology labels are dated, and current scholarship reads the population as mixed and regional rather than racially packaged.

Religion needs the same care. The horned figure on the Pashupati seal is often read as a proto-Shiva, lord of animals; it is an iconographic reading, not a proof, and alternative readings exist. Structures at Kalibangan and Lothal that excavators called fire altars carry the same flag: the fire-altar interpretation is disputed, and the platforms may have had domestic or industrial uses. Burial practice is firmer ground: extended inhumation, usually north to south, is the norm; Harappa has yielded wooden coffins, Lothal its much-discussed joint burials, and Kalibangan symbolic and fractional burials in which only selected bones or goods were interred.

The script nobody can read

The Harappan script is pictographic and follows the boustrophedon style, written right to left in one line and left to right in the next. It appears on seals, pottery, and famously on Dholavira's large sign-board, whose ten characters are each about 37 cm tall. Despite decades of effort, it remains undeciphered, unlike Mesopotamia's cuneiform and Egypt's hieroglyphics, both of which have been read.

Why the cities emptied: theories of decline

Around 1900 BCE the urban phase ended. The old idea, an Aryan invasion destroying the cities, is now outdated and discarded by modern scholars. The accepted explanations are environmental and economic:

Theories of decline

• Climate change and monsoon shift: eastward-shifting monsoons weakened agriculture across the region.
• River shifting and flooding: the Indus and Ghaggar-Hakra rivers changed course; repeated floods damaged farmland.
• Migration: artisans and traders moved toward Saurashtra and Haryana as river systems changed, draining the cities of their economic base.

The decline was gradual, not sudden, a Late Harappan phase of de-urbanization that stretched to about 1300 BCE.

Decline theories and their standing

The Harappan difference

Set beside its contemporaries, the civilisation’s character sharpens:

As Mortimer Wheeler put it, it was “an early experiment in urban living, whose lessons remain relevant even today.”

Women in the Harappan world

What do we actually know about women's lives in Harappan cities? Less than the textbooks sometimes imply. The famous Mother Goddess figurines are terracotta female figures found across sites, and the Dancing Girl bronze from Mohenjo-daro is a confident, ornamented young woman. Some burials contain women with rich grave goods, and spinning and weaving tools suggest textile work. But there is no palace, no king's list, and no text to tell us whether descent was traced through mothers or fathers. The honest answer, and the one UPSC rewards, is that the evidence supports neither a matriarchy nor a patriarchy claim: the Harappan gender order is genuinely unknown, and every confident assertion about it is speculation.

Key Terms

• wheat and barley: Wheat and barley are the winter (rabi) cereals that formed the staple diet of the Harappan civilisation, grown with flood and rainfall irrigation in the Indus plains. Their remains, along with granaries, mark settled agriculture as the economic base of urbanisation. For UPSC GS-1 (ancient history) they anchor questions on the Harappan economy and subsistence patterns. Example: Mehrgarh (c. 7000 BCE) shows some of the earliest evidence of barley cultivation in the subcontinent. Mehrgarh (c. 7000 BCE) shows some of the earliest evidence of barley cultivation in the subcontinent.
• ploughed field at Kalibangan: The ploughed field at Kalibangan is the excavated agricultural field at the Harappan site in Hanumangarh district, Rajasthan, dated to about 2800 BCE, the earliest ploughed field known from excavation. It shows two sets of furrows crossing at right angles, indicating two crops grown together, probably a grain and a pulse. For UPSC GS-1 ancient history, it proves plough agriculture in the Early Harappan phase. Example: the 1961-69 excavations by B.B. Lal and B.K. Thapar. the 1961-69 excavations by B.B. Lal and B.K. Thapar
• earliest producers of cotton: The earliest producers of cotton were the Neolithic inhabitants of Mehrgarh in present-day Balochistan, where archaeologists have found cotton fibres and seeds dating to around 6000 BCE. Cotton cultivation and spinning continued into the Harappan cities, with cloth fragments found at Mohenjo-daro. This matters for UPSC because it establishes India's primacy in cotton, a favourite prelims fact linking ancient agriculture, Harappan crafts and the later textile economy. Mehrgarh (Balochistan), c. 6000 BCE
• Weights and measures were standardized: Standardized weights and measures were a Harappan hallmark: cubical weights cut from chert in a careful binary and decimal series, found from Mohenjo-daro to Lothal, let merchants across the civilization weigh grain, metal and trade goods identically. This uniformity signals strong civic regulation and made long-distance exchange with Mesopotamia possible. For UPSC, the chert weights are the standard evidence of Harappan commercial sophistication and town planning.
• Mesopotamian texts refer to the Indus region as Meluha: Mesopotamian cuneiform texts of the third millennium BCE call the Indus region Meluhha (Meluha), naming it alongside Dilmun and Magan as a trading partner. They record imports such as gold, carnelian, ivory and the prized Meluhhan dog, and Harappan seals found in Mesopotamia confirm the contact. For UPSC ancient-history prelims, Meluha is the standard marker of Harappan long-distance maritime trade. the dockyard at Lothal (Gujarat), evidence of Harappan seafaring
• Dilmun: Dilmun was the Bronze Age trading civilisation centred on Bahrain, named in Mesopotamian records as the great entrepot linking Mesopotamia with Magan and Meluhha, the Indus region. Its merchants handled copper, pearls, timber and carnelian in a far-flung maritime network, and Harappan seals and goods found in the Gulf attest to the connection. For UPSC it matters for the external trade of the Indus Valley Civilisation. Mesopotamian texts describe Dilmun as the intermediary port through which Meluhhan goods reached the cities of Sumer.
• Makan: Makan is the Mesopotamian name for Magan, the region identified with modern-day Oman, which supplied copper to Mesopotamia during the Harappan period. Mesopotamian cuneiform texts name three trading partners in this network: Dilmun (Bahrain), Magan (Oman), and Meluhha (the Harappan/Indus region). This term is central to UPSC ancient history questions on Indus Valley external trade and NCERT-based questions on Mesopotamian trade contacts. Mesopotamian cuneiform records from Ur naming Magan
• no palaces, no royal tombs, no grand temples: No palaces, no royal tombs, no grand temples is the striking absence of monumental royal or religious architecture in Indus Valley cities. Unlike Mesopotamia and Egypt, Harappan sites show no grand palace, royal burial or great temple, which scholars read as evidence of a different, possibly more corporate or less personalised form of authority. For GS-1 ancient history it is a core marker of Harappan distinctiveness. Excavations at Mohenjo-daro and Harappa have revealed no identifiable palace or grand temple complex, unlike the ziggurats of Mesopotamia.
• Pashupati seal: The Pashupati seal is the famous steatite seal from Mohenjo-daro showing a horned, three-faced figure seated in a yogic posture and surrounded by animals including an elephant, tiger, rhinoceros and buffalo. John Marshall identified it as a proto-Shiva, 'Pashupati', lord of animals. For UPSC it is the signature prelims artefact of Harappan religion and a mains talking point on continuity in Indian religious traditions. the seal excavated at Mohenjo-daro
• Mother Goddess: Mother Goddess is a deity embodying fertility, creation, and nurturing power, worshipped in ancient cultures worldwide. In India she appears as the Harappan terracotta figurines, as Shakti and her forms such as Durga and Kali in Hinduism, and in later tantric traditions. Her cult reveals how agrarian societies sacralized reproduction and nature. For UPSC, the Mother Goddess is key ancient-history and art-and-culture prelims material on Harappan religion and the continuity of Shakti worship. Shakti worship in Hinduism, continuing the Harappan fertility cult
• script is pictographic: The phrase 'the script is pictographic' describes writing systems in which signs represent objects or ideas through pictures, as in the undeciphered script of the Harappan civilisation. Harappan seals carry short pictographic inscriptions whose signs depict animals, humans and geometric motifs, and the script remains unread because no bilingual text has been found. For UPSC GS-1 it is the standard answer to questions on Harappan writing. the pictographic seals of Mohenjo-daro
• boustrophedon: Boustrophedon is an ancient writing style in which lines run alternately left to right and right to left, like an ox turning at the end of each furrow while ploughing. It appears in some early Greek and other ancient inscriptions and represents a transitional stage before a fixed writing direction. It matters for UPSC because scripts, epigraphy, and writing systems are recurring prelims topics under ancient Indian and world history. Archaic Greek inscriptions written in alternating directions
• undeciphered: Undeciphered describes a script or writing system whose language and signs have not yet been read or understood by scholars. Decipherment typically needs a bilingual text or a long, varied corpus, as with the Rosetta Stone for Egyptian hieroglyphs. For UPSC, it serves GS-1 (ancient Indian history), since the undeciphered Indus script limits what can be known of Harappan language and administration. the Indus script, which remains undeciphered after a century of scholarly attempts
• Aryan invasion: Aryan invasion is the hypothesis, associated with 19th-century scholars such as Max Muller, that Indo-Aryan-speaking peoples migrated or invaded into the Indian subcontinent around 1500 BCE, bringing early Vedic culture with them. Modern scholarship generally recasts it as a gradual migration and cultural diffusion rather than a single invasion. For UPSC, it frames debates on Vedic origins and the decline of Harappan urbanism. It is routinely invoked in discussions of the composition and dating of the Rigveda.
• outdated and discarded: Outdated and discarded describes ideas, institutions or technologies that were once standard but have been superseded by better alternatives. In UPSC answers, calling something outdated and discarded must be backed by evidence of what replaced it, not by mere assertion. For UPSC, the phrase serves GS-3 science-and-tech and GS-1 history questions on change over time.
• Climate change and monsoon shift: Climate change and monsoon shift refers to the observed and projected alteration of the Indian monsoon under global warming: more erratic onset, longer dry spells punctuated by intense downpours, and changing spatial distribution of rainfall. Scientists link these shifts to warmer oceans and changing pressure gradients. For UPSC, it is a high-priority GS-1 and GS-3 topic connecting climate science with agriculture, water security and disaster management. IMD records showing a rise in very heavy rainfall days over central India since the 1950s, alongside shifts in monsoon onset timing.
• River shifting and flooding: River shifting and flooding is the fluvial process by which rivers in alluvial plains abruptly change course, called avulsion, and inundate surrounding land, driven by heavy silt load, tectonic tilting and monsoon discharge. It matters for GS-1 physical geography and GS-3 disaster management: prelims asks about the Kosi, called the sorrow of Bihar for its devastating course changes, and mains on flood management. the Kosi river, called the 'sorrow of Bihar'
• Migration: Migration is the movement of people within or across borders, driven by push factors such as poverty, conflict, and agrarian distress and pull factors such as jobs, education, and urban amenities. In India it appears as rural-urban, seasonal, and inter-state labour flows that reshape demography, cities, and remittances. For UPSC it is a core human-geography topic linking population, urbanisation, and inclusive growth, and a lens on labour welfare. The 2020 Covid lockdown triggered a mass reverse migration of workers to their home states, exposing gaps in migrant welfare.
• geographically the largest: Geographically the largest is a fragment pointing to India's largest state by area: Rajasthan, at about 342,239 square kilometres, roughly a tenth of the country's land area. Its size shapes its desert ecology, long border with Pakistan, mineral resources and administrative span. For UPSC (GS-1, Indian geography), state-area superlatives are classic Prelims facts, and area also matters in Mains answers on regional development. Rajasthan, India's largest state by area
• Mother Goddess figurines: Mother Goddess figurines are terracotta female figurines recovered from Harappan sites such as Mehergarh and Mohenjo-daro, typically depicted with broad hips, elaborate ornaments, and sometimes a fan-shaped headdress. Archaeologists interpret them as evidence of fertility cults and organized ritual belief in the Indus civilization. For UPSC, these figurines are a favorite art-and-culture prelims question, testing knowledge of Harappan religion, craft, and archaeological evidence. Terracotta figurines from Mehergarh, c. 3000 BCE
• Dancing Girl: The Dancing Girl is a 10.5 cm bronze statuette from Mohenjo-daro, dating to around 2500 BCE and made by the lost-wax casting technique. Depicting a young woman in a confident pose with bangles, it is celebrated as a masterpiece of Harappan art and metallurgy. For UPSC, it is a favourite prelims fact on Indus Valley art, craft specialisation, and urban culture. The statuette is displayed in the National Museum, New Delhi.