Bricks, Beads and Bones — The Harappan Civilisation

The Harappan or Indus Valley Civilisation (c. 2600–1900 BCE) is remarkable for its sophisticated urban planning — arguably the most organised of the ancient world: Town Planning Features: 1. Grid Pattern: Streets and lanes were laid out in a near-perfect grid — main streets running roughly north-south and east-west, crossing at right angles. This level of planning was unprecedented for the time. 2. The Citadel and the Lower Town: Most major Harappan cities (Mohenjo-daro, Harappa, Kalibangan) show a two-part division: • The Citadel (western, higher mound): A raised, fortified area containing what appear to be public or administrative buildings — the Great Bath, granaries, assembly halls. • The Lower Town (eastern, lower): Residential and commercial areas with brick houses, workshops, and lanes. 3. Standardised Burnt Brick: Harappans used baked (burnt) bricks of a consistent ratio (1:2:4 — thickness:width:length) across cities separated by hundreds of kilometres. This standardisation implies a high degree of central coordination. 4. The Great Bath (Mohenjo-daro): A large, carefully waterproofed brick tank (approximately 12m × 7m, 2.4m deep) with steps leading down on two sides. The precise construction (layers of bitumen for waterproofing) suggests it had a ritual or public function — perhaps for ritual purification. 5. Drainage System: Perhaps the most striking feature — covered brick drains ran along every street, connected to drains from houses. Waste water was directed into soak pits or larger drains. This level of sanitation infrastructure was not matched in many parts of the world until the 20th century. What these features suggest: • A strong, centralised authority capable of planning, standardising, and coordinating construction across a large area. • A prosperous society with surplus resources to invest in civic infrastructure. • The emphasis on drainage, sanitation, and public bathing suggests a society that placed high value on cleanliness and perhaps ritual purity.

Reconstructing Harappan Economic Life: • Historians and archaeologists reconstruct Harappan economy primarily from material evidence — artefacts, structures, raw materials, and seals — since the Harappan script has not yet been deciphered. Agriculture: • Evidence of wheat, barley, lentils, peas, sesame, and cotton cultivation. • Sites like Mehrgarh (a predecessor culture) show early crop cultivation. • The Harappans likely had an agricultural surplus that supported urban populations and craft specialists. • Irrigation canals have been found at some sites (Shortughai in Afghanistan), but large-scale irrigation is debated. Craft Production: • Harappan cities had specialised craft areas: - Bead-making: Thousands of beads in carnelian, steatite, lapis lazuli, gold, and shell — evidence of sophisticated lapidary techniques. - Metalwork: Copper and bronze tools, weapons, and ornaments. - Pottery: Distinctive red-ware pottery with black designs, produced on a wheel. - Textile: Evidence for cotton weaving (the Harappans were among the world's earliest cotton cultivators). - Seals: Over 2,000 steatite (soapstone) seals with animal motifs and the undeciphered script. Evidence for Long-Distance Trade: 1. Raw materials from distant sources: Lapis lazuli (Afghanistan), carnelian (Gujarat), copper (Rajasthan), steatite (various sources), shell (Gujarat coast) — none of these are local to core Harappan sites like Mohenjo-daro. Their presence implies organised procurement networks. 2. Harappan artefacts in Mesopotamia: Harappan seals, beads, and other objects have been found in Mesopotamian sites (modern Iraq), and Mesopotamian texts mention trade with a land called 'Meluhha' — widely identified with the Harappan civilisation. Goods exported likely included cotton textiles, beads, timber, and ivory. 3. Weights and measures: Standardised stone weights in a consistent binary system found across Harappan sites — essential for regulated trade. 4. Gateway cities: Sites like Lothal (Gujarat) had a possible dockyard — suggesting maritime trade along the coast.

The decline of the Harappan civilisation (c. 1900–1700 BCE) is one of archaeology's great unsolved problems. The urban centres were gradually abandoned over several centuries. Multiple theories have been proposed: 1. Environmental/Climatic Change: • Geological and environmental studies suggest a prolonged drought or climate change around 2000 BCE affected the entire region from Egypt to India (the '4.2 kiloyear event'). • Reduced rainfall would have undermined agriculture, causing food shortages and forcing population migration. • Changes in the courses of rivers — particularly the drying up of the Ghaggar-Hakra (possibly the ancient Saraswati) river — may have deprived major urban centres of water. 2. Tectonic Activity and Flooding: • Evidence of periodic flooding at Mohenjo-daro — silt deposits over earlier structures — suggests the Indus may have repeatedly flooded the city. • Tectonic shifts may have blocked river outlets, causing lakes to form and flooding settlements. 3. Decline of Trade: • The disruption of long-distance trade networks (with Mesopotamia and Central Asia) may have undermined the economic basis of Harappan urban life. • Without trade in luxury goods, the specialised craft economy of the cities could not be sustained. 4. 'Aryan Invasion' Theory (now largely discredited): • The older theory that Indo-Aryan migrants (or invaders) destroyed the Harappan cities is not supported by current archaeological evidence. There is no evidence of mass violence or warfare at most Harappan sites at the time of decline. • The linguistic and genetic evidence for migration from the steppe is real, but migration was gradual and the Harappan decline preceded significant contact. 5. Epidemics: • Some scholars have proposed disease as a contributing factor — skeletal evidence at Mohenjo-daro shows some individuals died without burial. 6. Combination of Factors (current consensus): • Most historians and archaeologists now believe the decline was gradual and resulted from a combination of environmental stress, disrupted trade, and social reorganisation — not a single catastrophic event. • Post-decline, population shifted eastward into the Gangetic plains, continuing many cultural traditions in a 'post-urban' form.