The Indus (Harappan) Civilization

The Indus or Harappan Civilization (c. 2600-1900 BCE mature phase) was one of the world's earliest urban civilizations, contemporary with Egypt and Mesopotamia, spread across a vast area of present-day Pakistan and northwest India encompassing sites like Mohenjo-daro, Harappa, Dholavira, Lothal, Rakhigarhi, and Kalibangan. Its cities display remarkable planning: grid-pattern streets, standardized burnt-brick sizes, sophisticated drainage systems with covered drains running beneath streets, and citadel-lower town divisions — features suggesting strong centralized planning authority or widely shared civic norms, though the exact nature of Harappan governance remains unknown due to the undeciphered script.

Harappan economy rested on agriculture (wheat, barley, and later evidence of rice and millets), craft specialization (bead-making, shell-working, metallurgy), and long-distance trade — Harappan seals and materials such as lapis lazuli and carnelian have been found in Mesopotamian sites, and Mesopotamian texts refer to trade with 'Meluhha', widely identified with the Indus region. Standardized weights, made of chert cubes in a binary system, found consistently across Harappan sites from Punjab to Gujarat, indicate a shared system of exchange and measurement across an enormous geographic area, a striking sign of economic integration without clear evidence of a single unifying imperial authority like a monarchy.

The Indus script, found on thousands of seals, remains undeciphered despite numerous claimed decipherments; it is short (average inscription length under five signs), making statistical decipherment extremely difficult, and scholars remain divided over whether it represents a full writing system encoding a specific language (with candidates including Dravidian or an Austroasiatic language) or a non-linguistic system of symbols such as clan or trade emblems, a controversial position advanced by Steve Farmer, Richard Sproat, and Michael Witzel that provoked strong pushback from Indian archaeologists and linguists including Asko Parpola and Iravatham Mahadevan.

The civilization's decline around 1900 BCE was long attributed to an 'Aryan invasion', a theory now widely rejected by archaeologists for lack of supporting material evidence of violent conquest at Harappan sites. Current explanations emphasize environmental factors: the drying up or shifting of rivers, notably the Ghaggar-Hakra (often identified with the Vedic Saraswati), possibly linked to changes in monsoon patterns, leading to gradual deurbanization, population dispersal to smaller settlements, and a shift toward the Gangetic plain in the subsequent 'Late Harappan' phase rather than a single catastrophic collapse.

The Indus Civilization occupies a fraught place in Indian public discourse: nationalist and Hindutva-inflected narratives sometimes seek to identify Harappan civilization directly with Vedic Sanskrit-speaking Aryans to claim an unbroken indigenous civilizational continuity, a position most professional archaeologists and historians, including B.B. Lal in his later more cautious work and firmly Romila Thapar, treat with considerable scepticism given the absence of decipherable textual confirmation and complexities in the archaeological and genetic evidence, including recent ancient-DNA studies that complicate simple migration or indigenous-origin narratives alike.