The Indus Valley: a lost urban civilisation
AdvancedThe Indus Valley's Harappan civilisation (c. 2600–1900 BC) had grid-planned streets, standardised brick houses and advanced drains, and traded with Mesopotamia; its script is still undeciphered and its sudden decline remains a mystery.
- Harappan civilisation (c. 2600–1900 BC): Harappa + Mohenjo-daro
- Planning: grid streets, standard bricks, drains, Great Bath
- First to grow cotton; mystery: unread script, unexplained decline
§Text Passage
1Around 2600 BC more than a thousand settlements lined the Indus, in today's Pakistan, with Harappa and Mohenjo-daro as the two great cities at the civilisation's height. No unified empire ever formed here, yet the cities shared near-identical plans, one standard of brick and a common set of weights and measures — evidence of close contact, and perhaps of a shared political or commercial network.
2Indus town planning led the ancient world: streets crossed in a grid, houses were built of standardised baked bricks, most with their own wells and bathrooms, and drains ran along the streets, each house's pipes joined to the main line so waste flowed out of the city. Such complete public sanitation was more advanced than in contemporary Mesopotamia and Egypt, proof of remarkably capable municipal management.
3Farmers grew wheat and barley, and the Indus people were the first to cultivate cotton, leading the world in textiles. The whole region used standard weights in ratios of 1:2:4:8 to keep trade fair, and seals carved with animals and script were pressed onto the clay sealing goods, working like trademarks or signatures. Merchants even sailed to Mesopotamia — Sumerian records call the land Meluhha — showing how thriving the sea trade had become.
4Archaeologists have found no grand palaces or royal tombs and few weapons, so they infer a comparatively equal society whose power may have lain with merchants or priests; but the seal script is still undeciphered, and every such conclusion remains an inference. From about 1900 BC weakening monsoons and shifting rivers broke the farming base, and the cities slowly emptied. The civilisation was rediscovered only in the 1920s, and Dholavira joined the World Heritage List in 2021.
1Summary 重點摘要
The Indus Valley's Harappan civilisation (c. 2600–1900 BC) had grid-planned streets, standardised brick houses and advanced drains, and traded with Mesopotamia; its script is still undeciphered and its sudden decline remains a mystery.
2Vocabulary cards Vocabulary
One of the civilisation's two great sites (excavated from 1921), which gave it the name 'Harappan civilisation'.
'Mound of the Dead' — the largest city, with a citadel, Great Bath and tens of thousands of residents, excavated from 1922.
A large brick pool on Mohenjo-daro's citadel, waterproofed with bitumen, probably used for ritual bathing.
Small stone stamps carved with animals and script, used to mark goods; also found in Mesopotamia, proving long-distance trade.
The Indus script — some 400–500 symbols on seals and pottery — has never been read.
A town layout of streets meeting at right angles like a chessboard — the hallmark of Indus city planning.
Brick drains running along the streets, connected to almost every house — sanitation unmatched among contemporary civilisations.
The raised, fortified part of a city; Mohenjo-daro's Great Bath stood on its citadel.
3Step by step Steps
- c. 2600 BC: urban maturityAround 2600 BC over a thousand settlements lined the Indus (in today's Pakistan), with Harappa and Mohenjo-daro as the two great cities as the civilisation reached maturity. What makes it unique is that no unified empire ever formed here: instead many cities shared near-identical plans, one standard of brick and a common set of weights and measures — proof of close contact, and perhaps of a shared political or commercial network.
- Advanced town planningIndus town planning stood at the top of the ancient world: streets crossed in a grid, houses were built of standardised baked bricks, most with their own wells and bathrooms, and drains ran along the streets, each house's pipes joined to the main line so waste flowed smoothly out of the city. Such complete public sanitation was more advanced than in contemporary Mesopotamia and Egypt, evidence of remarkably capable municipal management.
- Economy and tradeFarmers grew wheat and barley, and the Indus people were the first to cultivate cotton, leading the world in textiles. For trade, the whole region used standard weights in ratios of 1:2:4:8, keeping transactions fair and easy; seals carved with animals and script were pressed onto the clay sealing goods, working like trademarks or signatures. Merchants sailed to Mesopotamia, which Sumerian records call Meluhha — clear evidence of a thriving sea trade.
- The social puzzleArchaeologists have found no grand palaces, lavish royal tombs or stockpiles of weapons — a sharp contrast with Mesopotamia and Egypt. From this, scholars infer a comparatively equal society with little war, its power perhaps in the hands of merchants or priests. But the seal script remains undeciphered, so every such conclusion is only a plausible inference from the archaeological evidence; the real answers await future research.
- c. 1900 BC: declineFrom about 1900 BC the cities slowly emptied and the flourishing civilisation faded away without a trace of conquest. The leading hypothesis holds that weakening monsoons, shifting rivers or erratic floods broke the farming base and, with it, the urban economy; the old 'Aryan invasion' explanation has been abandoned for lack of evidence. The civilisation was only rediscovered in the 1920s, and many sites still lie buried, waiting for archaeologists.
- Crafts and other sitesMohenjo-daro yielded the bronze 'Dancing Girl' and the steatite 'Priest-King'; bead-makers drilled fine holes in carnelian. The civilisation covered more ground than Mesopotamia and Egypt: Lothal in Gujarat has the remains of a possible dockyard, and Dholavira built reservoirs — inscribed on the World Heritage List in 2021.
4Diagrams Diagrams
5Worked example Example
Example: why do scholars infer a fairly equal society in the Indus Valley? Show how to reason from archaeology — and state its limits.
- Evidence 1: no palaces or grand royal tombs have been found — a sharp contrast with Egypt's pyramids, suggesting no extremely concentrated kingship here.
- Evidence 2: house sizes differ far less sharply than in Mesopotamia; the gap between ordinary homes and large buildings is comparatively mild.
- Evidence 3: one brick standard and one set of weights and measures across the whole region show society running on shared standards, not rival elite households.
- Inference: wealth and power were fairly evenly spread; rulers were perhaps merchants or priests rather than warrior kings.
- Limit: the seal script is still undeciphered, so these conclusions are plausible inferences from archaeology, not settled facts.
- Answer: From the archaeological record — no palaces, no royal tombs, mild gaps between houses and one building standard everywhere — scholars infer a fairly even spread of wealth and power, with merchants or priests as a possible ruling class. A good answer shows two steps: first state the evidence, then state its limits. Because the script is undeciphered, every conclusion remains a plausible inference rather than settled fact, and pointing out that limit is what makes the reasoning rigorous.
6Common mistakes Mistakes
7Quick check Quick check
Q1When did the Harappan civilisation flourish, and what were its two great cities?
Q2What feature of Indus cities most amazed archaeologists?
Q3Why is the Indus Valley called a 'lost civilisation'?
Q4What evidence shows trade between the Indus Valley and Mesopotamia?
Q5Where is the Great Bath located?
8Recap Recap
- Harappan civilisation (c. 2600–1900 BC): Harappa + Mohenjo-daro
- Planning: grid streets, standard bricks, drains, Great Bath
- First to grow cotton; mystery: unread script, unexplained decline
- Seals unearthed as far as Mesopotamia → land and sea trade with Sumer
- No palaces or royal tombs → scholars infer a fairly equal society; with the script unread, all such conclusions remain inferences