Indus Valley Civilization
The Indus Valley Civilization (IVC) was a Bronze Age civilization (3300–1300 BCE; mature period 2600–1900 BCE) extending from what today is northeast Afghanistan to Pakistan and northwest India (see map). Along with Ancient Egypt and Mesopotamia it was one of three early civilizations of the Old World, and of the three the most widespread, covering an area of 1.25 million km2. It flourished in the basins of the Indus River, one of the major rivers of Asia, and the Ghaggar-Hakra River, which once coursed through northwest India and eastern Pakistan.
At its peak, the Indus Civilization may have had a population of over five million. Inhabitants of the ancient Indus river valley developed new techniques in handicraft (carnelian products, seal carving) and metallurgy (copper, bronze, lead, and tin). The Indus cities are noted for their urban planning, baked brick houses, elaborate drainage systems, water supply systems, and clusters of large non-residential buildings.
The Indus Valley Civilization is also known as the Harappan Civilization, after Harappa, the first of its sites to be excavated in the 1920s, in what was then the Punjab province of British India, and is now in Pakistan. The discovery of Harappa, and soon afterwards, Mohenjo-Daro, was the culmination of work beginning in 1861 with the founding of the Archaeological Survey of India in the British Raj. Excavation of Harappan sites has been ongoing since 1920, with important breakthroughs occurring as recently as 1999. There were earlier and later cultures, often called Early Harappan and Late Harappan, in the same area of the Harappan Civilization. The Harappan civilization is sometimes called the Mature Harappan culture to distinguish it from these cultures. By 1999, over 1,056 cities and settlements had been found, of which 96 have been excavated, mainly in the general region of the Indus and Ghaggar-Hakra Rivers and their tributaries. Among the settlements were the major urban centres of Harappa, Mohenjo-daro (UNESCO World Heritage Site), Dholavira, Ganeriwala in Cholistan and Rakhigarhi.
The Harappan language is not directly attested and its affiliation is uncertain since the Indus script is still undeciphered. A relationship with the Dravidian or Elamo-Dravidian language family is favored by a section of scholars,[page needed] while others suggest an Austroasiatic language related to Munda.
Skeletal remains at Harappan sites belonged to proto-Australoid, Mongoloid, Mediterranean and Alpine.
- 1 Discovery and history of excavation
- 2 Chronology
- 3 Geography
- 4 Early Harappan
- 5 Mature Harappan
- 6 Collapse and Late Harappan
- 7 Legacy
- 8 Historical context and linguistic affiliation
- 9 See also
- 10 Notes
- 11 References
- 12 Bibliography
- 13 External links
Discovery and history of excavation
The ruins of Harappa were first described in 1842 by Charles Masson in his Narrative of Various Journeys in Balochistan, Afghanistan, and the Punjab, where locals talked of an ancient city extending "thirteen cosses" (about 25 miles), but no archaeological interest would attach to this for nearly a century.[note 1]
In 1856, General Alexander Cunningham, later director general of the archaeological survey of northern India, visited Harappa where the British engineers John and William Brunton were laying the East Indian Railway Company line connecting the cities of Karachi and Lahore. John wrote: "I was much exercised in my mind how we were to get ballast for the line of the railway". They were told of an ancient ruined city near the lines, called Brahminabad. Visiting the city, he found it full of hard well-burnt bricks, and, "convinced that there was a grand quarry for the ballast I wanted", the city of Brahminabad was reduced to ballast. A few months later, further north, John's brother William Brunton's "section of the line ran near another ruined city, bricks from which had already been used by villagers in the nearby village of Harappa at the same site. These bricks now provided ballast along 93 miles (150 km) of the railroad track running from Karachi to Lahore".
In 1872–75 Alexander Cunningham published the first Harappan seal (with an erroneous identification as Brahmi letters). It was half a century later, in 1912, that more Harappan seals were discovered by J. Fleet, prompting an excavation campaign under Sir John Hubert Marshall in 1921–22 and resulting in the discovery of the civilization at Harappa by Sir John Marshall, Rai Bahadur Daya Ram Sahni and Madho Sarup Vats, and at Mohenjo-daro by Rakhal Das Banerjee, E. J. H. MacKay, and Sir John Marshall. By 1931, much of Mohenjo-Daro had been excavated, but excavations continued, such as that led by Sir Mortimer Wheeler, director of the Archaeological Survey of India in 1944. Among other archaeologists who worked on IVC sites before the independence in 1947 were Ahmad Hasan Dani, Brij Basi Lal, Nani Gopal Majumdar, and Sir Marc Aurel Stein.
Following the independence, the bulk of the archaeological finds were inherited by Pakistan where most of the IVC was based, and excavations from this time include those led by Sir Mortimer Wheeler in 1949, archaeological adviser to the Government of Pakistan. Outposts of the Indus Valley civilization were excavated as far west as Sutkagan Dor in Baluchistan, as far north as at Shortugai on the Amu Darya (the river's ancient name was Oxus) in current Afghanistan, as far east as at Alamgirpur, Uttar Pradesh, India and as far south as at Malwan, Surat Dist., India.
In 2010, heavy floods hit Haryana in India and damaged the archaeological site of Jognakhera, where ancient copper smelting were found dating back almost 5,000 years. The Indus Valley Civilization site was hit by almost 10 feet of water as the Sutlej Yamuna link canal overflowed.
The mature phase of the Harappan civilization lasted from c. 2600 to 1900 BCE. With the inclusion of the predecessor and successor cultures—Early Harappan and Late Harappan, respectively—the entire Indus Valley Civilization may be taken to have lasted from the 33rd to the 14th centuries BCE. Two terms are employed for the periodization of the IVC: Phases and Eras. The Early Harappan, Mature Harappan, and Late Harappan phases are also called the Regionalisation, Integration, and Localisation eras, respectively, with the Regionalization era reaching back to the Neolithic Mehrgarh II period. "Discoveries at Mehrgarh changed the entire concept of the Indus civilization", according to Ahmad Hasan Dani, professor emeritus at Quaid-e-Azam University, Islamabad. "There we have the whole sequence, right from the beginning of settled village life."
|7000–5500 BCE||Mehrgarh I (aceramic Neolithic)||Early Food-Producing Era|
|5500–3300||Mehrgarh II-VI (ceramic Neolithic)||Regionalisation Era|
|3300–2800||Harappan 1 (Ravi Phase)|
|2800–2600||Harappan 2 (Kot Diji Phase, Nausharo I, Mehrgarh VII)|
|2600–1900||Mature Harappan (Indus Valley Civilization)||Integration Era|
|2600–2450||Harappan 3A (Nausharo II)|
|1900–1300||Late Harappan (Cemetery H); Ochre Coloured Pottery||Localisation Era|
|1300–300||Painted Gray Ware, Northern Black Polished Ware (Iron Age)||Indo-Gangetic Tradition|
The Indus Valley Civilization encompassed most of Pakistan and parts of northwestern India, Afghanistan and Iran, extending from Balochistan in the west to Uttar Pradesh in the east, northeastern Afghanistan to the north and Maharashtra to the south. The geography of the Indus Valley put the civilizations that arose there in a highly similar situation to those in Egypt and Peru, with rich agricultural lands being surrounded by highlands, desert, and ocean. Recently, Indus sites have been discovered in Pakistan's northwestern Frontier Province as well. Other IVC colonies can be found in Afghanistan while smaller isolated colonies can be found as far away as Turkmenistan and in Gujarat. Coastal settlements extended from Sutkagan Dor in Western Baluchistan to Lothal in Gujarat. An Indus Valley site has been found on the Oxus River at Shortughai in northern Afghanistan, in the Gomal River valley in northwestern Pakistan, at Manda,Jammu on the Beas River near Jammu, India, and at Alamgirpur on the Hindon River, only 28 km from Delhi. Indus Valley sites have been found most often on rivers, but also on the ancient seacoast, for example, Balakot, and on islands, for example, Dholavira.
There is evidence of dry river beds overlapping with the Hakra channel in Pakistan and the seasonal Ghaggar River in India. Many Indus Valley (or Harappan) sites have been discovered along the Ghaggar-Hakra beds. Among them are: Rupar, Rakhigarhi, Sothi, Kalibangan, and Ganwariwala. According to J. G. Shaffer and D. A. Lichtenstein, the Harappan Civilization "is a fusion of the Bagor, Hakra, and Koti Dij traditions or 'ethnic groups' in the Ghaggar-Hakra valley on the borders of India and Pakistan".
According to some archaeologists, more than 500 Harappan sites have been discovered along the dried up river beds of the Ghaggar-Hakra River and its tributaries, in contrast to only about 100 along the Indus and its tributaries; consequently, in their opinion, the appellation Indus Ghaggar-Hakra civilization or Indus-Saraswati civilization is justified. However, these politically inspired arguments are disputed by other archaeologists who state that the Ghaggar-Hakra desert area has been left untouched by settlements and agriculture since the end of the Indus period and hence shows more sites than found in the alluvium of the Indus valley; second, that the number of Harappan sites along the Ghaggar-Hakra river beds have been exaggerated and that the Ghaggar-Hakra, when it existed, was a tributary of the Indus, so the new nomenclature is redundant. "Harappan Civilization" remains the correct one, according to the common archaeological usage of naming a civilization after its first findspot.
The Early Harappan Ravi Phase, named after the nearby Ravi River, lasted from circa 3300 BCE until 2800 BCE. It is related to the Hakra Phase, identified in the Ghaggar-Hakra River Valley to the west, and predates the Kot Diji Phase (2800–2600 BCE, Harappan 2), named after a site in northern Sindh, Pakistan, near Mohenjo Daro. The earliest examples of the Indus script dated to 3rd millennium BC. Discoveries from Bhirrana, Rajasthan, in India, by archeologist K. N. Dikshit indicate that Hakra ware from this area dates from as early as 7500 BC.
The mature phase of earlier village cultures is represented by Rehman Dheri and Amri in Pakistan. Kot Diji (Harappan 2) represents the phase leading up to Mature Harappan, with the citadel representing centralised authority and an increasingly urban quality of life. Another town of this stage was found at Kalibangan in India on the Hakra River.
Trade networks linked this culture with related regional cultures and distant sources of raw materials, including lapis lazuli and other materials for bead-making. Villagers had, by this time, domesticated numerous crops, including peas, sesame seeds, dates, and cotton, as well as animals, including the water buffalo. Early Harappan communities turned to large urban centres by 2600 BCE, from where the mature Harappan phase started.
By 2600 BCE, the Early Harappan communities had been turned into large urban centres. Such urban centres include Harappa, Ganeriwala, Mohenjo-Daro in modern day Pakistan, and Dholavira, Kalibangan, Rakhigarhi, Rupar, and Lothal in modern day India. In total, more than 1,052 cities and settlements have been found, mainly in the general region of the Indus Rivers and their tributaries.
A sophisticated and technologically advanced urban culture is evident in the Indus Valley Civilization making them the first urban centres in the region. The quality of municipal town planning suggests the knowledge of urban planning and efficient municipal governments which placed a high priority on hygiene, or, alternatively, accessibility to the means of religious ritual.
As seen in Harappa, Mohenjo-Daro and the recently partially excavated Rakhigarhi, this urban plan included the world's first known urban sanitation systems: see hydraulic engineering of the Indus Valley Civilization. Within the city, individual homes or groups of homes obtained water from wells. From a room that appears to have been set aside for bathing, waste water was directed to covered drains, which lined the major streets. Houses opened only to inner courtyards and smaller lanes. The house-building in some villages in the region still resembles in some respects the house-building of the Harappans.
The ancient Indus systems of sewerage and drainage that were developed and used in cities throughout the Indus region were far more advanced than any found in contemporary urban sites in the Middle East and even more efficient than those in many areas of Pakistan and India today. The advanced architecture of the Harappans is shown by their impressive dockyards, granaries, warehouses, brick platforms, and protective walls. The massive walls of Indus cities most likely protected the Harappans from floods and may have dissuaded military conflicts.
The purpose of the citadel remains debated. In sharp contrast to this civilization's contemporaries, Mesopotamia and Ancient Egypt, no large monumental structures were built. There is no conclusive evidence of palaces or temples—or of kings, armies, or priests. Some structures are thought to have been granaries. Found at one city is an enormous well-built bath (the "Great Bath"), which may have been a public bath. Although the citadels were walled, it is far from clear that these structures were defensive. They may have been built to divert flood waters.
Most city dwellers appear to have been traders or artisans, who lived with others pursuing the same occupation in well-defined neighbourhoods. Materials from distant regions were used in the cities for constructing seals, beads and other objects. Among the artifacts discovered were beautiful glazed faïence beads. Steatite seals have images of animals, people (perhaps gods), and other types of inscriptions, including the yet un-deciphered writing system of the Indus Valley Civilization. Some of the seals were used to stamp clay on trade goods and most probably had other uses as well.
Although some houses were larger than others, Indus Civilization cities were remarkable for their apparent, if relative, egalitarianism. All the houses had access to water and drainage facilities. This gives the impression of a society with relatively low wealth concentration, though clear social levelling is seen in personal adornments.
Authority and governance
Archaeological records provide no immediate answers for a center of power or for depictions of people in power in Harappan society. But, there are indications of complex decisions being taken and implemented. For instance, the extraordinary uniformity of Harappan artifacts as evident in pottery, seals, weights and bricks. These are the major theories:
- There was a single state, given the similarity in artifacts, the evidence for planned settlements, the standardised ratio of brick size, and the establishment of settlements near sources of raw material.
- There was no single ruler but several: Mohenjo-daro had a separate ruler, Harappa another, and so forth.
- Harappan society had no rulers, and everybody enjoyed equal status.
The people of the Indus Civilization achieved great accuracy in measuring length, mass, and time. They were among the first to develop a system of uniform weights and measures. A comparison of available objects indicates large scale variation across the Indus territories. Their smallest division, which is marked on an ivory scale found in Lothal, was approximately 1.704 mm, the smallest division ever recorded on a scale of the Bronze Age. Harappan engineers followed the decimal division of measurement for all practical purposes, including the measurement of mass as revealed by their hexahedron weights.
These chert weights were in a ratio of 5:2:1 with weights of 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 10, 20, 50, 100, 200, and 500 units, with each unit weighing approximately 28 grams, similar to the English Imperial ounce or Greek uncia, and smaller objects were weighed in similar ratios with the units of 0.871. However, as in other cultures, actual weights were not uniform throughout the area. The weights and measures later used in Kautilya's Arthashastra (4th century BCE) are the same as those used in Lothal.
In 2001, archaeologists studying the remains of two men from Mehrgarh, Pakistan, made the discovery that the people of the Indus Valley Civilization, from the early Harappan periods, had knowledge of proto-dentistry. Later, in April 2006, it was announced in the scientific journal Nature that the oldest (and first early Neolithic) evidence for the drilling of human teeth in vivo (i.e., in a living person) was found in Mehrgarh. Eleven drilled molar crowns from nine adults were discovered in a Neolithic graveyard in Mehrgarh that dates from 7,500–9,000 years ago. According to the authors, their discoveries point to a tradition of proto-dentistry in the early farming cultures of that region.
Arts and crafts
A number of gold, terracotta and stone figurines of girls in dancing poses reveal the presence of some dance form. Also, these terracotta figurines included cows, bears, monkeys, and dogs. The animal depicted on a majority of seals at sites of the mature period has not been clearly identified. Part bull, part zebra, with a majestic horn, it has been a source of speculation. As yet, there is insufficient evidence to substantiate claims that the image had religious or cultic significance, but the prevalence of the image raises the question of whether or not the animals in images of the IVC are religious symbols.
Sir John Marshall reacted with surprise when he saw the famous Indus bronze statuette of a slender-limbed dancing girl in Mohenjo-Daro:
When I first saw them I found it difficult to believe that they were prehistoric; they seemed to completely upset all established ideas about early art, and culture. Modeling such as this was unknown in the ancient world up to the Hellenistic age of Greece, and I thought, therefore, that some mistake must surely have been made; that these figures had found their way into levels some 3000 years older than those to which they properly belonged .... Now, in these statuettes, it is just this anatomical truth which is so startling; that makes us wonder whether, in this all-important matter, Greek artistry could possibly have been anticipated by the sculptors of a far-off age on the banks of the Indus.
Many crafts "such as shell working, ceramics, and agate and glazed steatite bead making" were used in the making of necklaces, bangles, and other ornaments from all phases of Harappan sites and some of these crafts are still practised in the subcontinent today. Some make-up and toiletry items (a special kind of combs (kakai), the use of collyrium and a special three-in-one toiletry gadget) that were found in Harappan contexts still have similar counterparts in modern India. Terracotta female figurines were found (ca. 2800-2600 BCE) which had red colour applied to the "manga" (line of partition of the hair).
This figure, sometimes known as a Pashupati, has been variously identified. Sir John Marshall identified a resemblance to the Hindu god, Shiva. If this can be validated, it would be evidence that some aspects of Hinduism predate the earliest texts, the Veda.
A harp-like instrument depicted on an Indus seal and two shell objects found at Lothal indicate the use of stringed musical instruments. The Harappans also made various toys and games, among them cubical dice (with one to six holes on the faces), which were found in sites like Mohenjo-Daro.
Trade and transportation
The Indus civilization's economy appears to have depended significantly on trade, which was facilitated by major advances in transport technology. The IVC may have been the first civilization to use wheeled transport. These advances may have included bullock carts that are identical to those seen throughout South Asia today, as well as boats. Most of these boats were probably small, flat-bottomed craft, perhaps driven by sail, similar to those one can see on the Indus River today; however, there is secondary evidence of sea-going craft. Archaeologists have discovered a massive, dredged canal and what they regard as a docking facility at the coastal city of Lothal in western India (Gujarat state). An extensive canal network, used for irrigation, has however also been discovered by H.-P. Francfort.
During 4300–3200 BCE of the chalcolithic period (copper age), the Indus Valley Civilization area shows ceramic similarities with southern Turkmenistan and northern Iran which suggest considerable mobility and trade. During the Early Harappan period (about 3200–2600 BCE), similarities in pottery, seals, figurines, ornaments, etc. document intensive caravan trade with Central Asia and the Iranian plateau.
Judging from the dispersal of Indus civilization artifacts, the trade networks, economically, integrated a huge area, including portions of Afghanistan, the coastal regions of Persia, northern and western India, and Mesopotamia. Studies of tooth enamel from individuals buried at Harappa suggest that some residents had migrated to the city from beyond the Indus valley. There is some evidence that trade contacts extended to Crete and possibly to Egypt.
There was an extensive maritime trade network operating between the Harappan and Mesopotamian civilizations as early as the middle Harappan Phase, with much commerce being handled by "middlemen merchants from Dilmun" (modern Bahrain and Failaka located in the Persian Gulf). Such long-distance sea trade became feasible with the innovative development of plank-built watercraft, equipped with a single central mast supporting a sail of woven rushes or cloth.
Several coastal settlements like Sotkagen-dor (astride Dasht River, north of Jiwani), Sokhta Koh (astride Shadi River, north of Pasni), and Balakot (near Sonmiani) in Pakistan along with Lothal in India testify to their role as Harappan trading outposts. Shallow harbors located at the estuaries of rivers opening into the sea allowed brisk maritime trade with Mesopotamian cities.
Some post-1980 studies indicate that food production was largely indigenous to the Indus Valley. It is known that the people of Mehrgarh used domesticated wheats and barley, and the major cultivated cereal crop was naked six-row barley, a crop derived from two-row barley (see Shaffer and Liechtenstein 1995, 1999). Archaeologist Jim G. Shaffer (1999: 245) writes that the Mehrgarh site "demonstrates that food production was an indigenous South Asian phenomenon" and that the data support interpretation of "the prehistoric urbanization and complex social organization in South Asia as based on indigenous, but not isolated, cultural developments". Others, such as Dorian Fuller, however, indicate that it took some 2000 years before Middle Eastern wheat was acclimatised to South Asian conditions.
Between 400 and as many as 600 distinct Indus symbols have been found on seals, small tablets, ceramic pots and more than a dozen other materials, including a "signboard" that apparently once hung over the gate of the inner citadel of the Indus city of Dholavira.
Typical Indus inscriptions are no more than four or five characters in length, most of which (aside from the Dholavira "signboard") are tiny; the longest on a single surface, which is less than 1 inch (2.54 cm) square, is 17 signs long; the longest on any object (found on three different faces of a mass-produced object) has a length of 26 symbols.
While the Indus Valley Civilization is generally characterized as a literate society on the evidence of these inscriptions, this description has been challenged by Farmer, Sproat, and Witzel (2004) who argue that the Indus system did not encode language, but was instead similar to a variety of non-linguistic sign systems used extensively in the Near East and other societies, to symbolise families, clans, gods, and religious concepts. Others have claimed on occasion that the symbols were exclusively used for economic transactions, but this claim leaves unexplained the appearance of Indus symbols on many ritual objects, many of which were mass-produced in moulds. No parallels to these mass-produced inscriptions are known in any other early ancient civilizations.
In a 2009 study by P. N. Rao et al. published in Science, computer scientists, comparing the pattern of symbols to various linguistic scripts and non-linguistic systems, including DNA and a computer programming language, found that the Indus script's pattern is closer to that of spoken words, supporting the hypothesis that it codes for an as-yet-unknown language.
Farmer, Sproat, and Witzel have disputed this finding, pointing out that Rao et al. did not actually compare the Indus signs with "real-world non-linguistic systems" but rather with "two wholly artificial systems invented by the authors, one consisting of 200,000 randomly ordered signs and another of 200,000 fully ordered signs, that they spuriously claim represent the structures of all real-world non-linguistic sign systems". Farmer et al. have also demonstrated that a comparison of a non-linguistic system like medieval heraldic signs with natural languages yields results similar to those that Rao et al. obtained with Indus signs. They conclude that the method used by Rao et al. cannot distinguish linguistic systems from non-linguistic ones.
The messages on the seals have proved to be too short to be decoded by a computer. Each seal has a distinctive combination of symbols and there are too few examples of each sequence to provide a sufficient context. The symbols that accompany the images vary from seal to seal, making it impossible to derive a meaning for the symbols from the images. There have, nonetheless, been a number of interpretations offered for the meaning of the seals. These interpretations have been marked by ambiguity and subjectivity.:69
Photos of many of the thousands of extant inscriptions are published in the Corpus of Indus Seals and Inscriptions (1987, 1991, 2010), edited by Asko Parpola and his colleagues. The final, third, volume, republished photos taken in the 1920s and 1930s of hundreds of lost or stolen inscriptions, along with many discovered in the last few decades. Formerly, researchers had to supplement the materials in the Corpus by study of the tiny photos in the excavation reports of Marshall (1931), MacKay (1938, 1943), Wheeler (1947), or reproductions in more recent scattered sources.
The religion and belief system of the Indus valley people have received considerable attention, especially from the view of identifying precursors to deities and religious practices of Indian religions that later developed in the area. However due to the sparsity of evidence, which is open to varying interpretations, and the fact that the Indus script remains undeciphered, the conclusions are partly speculative and largely based on a retrospective view from a much later Hindu perspective. An early and influential work in the area that set the trend for Hindu interpretations of archaeological evidence from the Harrapan sites was that of John Marshall, who in 1931 identified the following as prominent features of the Indus religion: a Great Male God and a Mother Goddess; deification or veneration of animals and plants; symbolic representation of the phallus (linga) and vulva (yoni); and, use of baths and water in religious practice. Marshall's interpretations have been much debated, and sometimes disputed over the following decades.
One Indus valley seal shows a seated, possibly ithyphallic and tricephalic, figure with a horned headdress, surrounded by animals. Marshall identified the figure as an early form of the Hindu god Shiva (or Rudra), who is associated with asceticism, yoga, and linga; regarded as a lord of animals; and often depicted as having three heads. The seal has hence come to be known as the Pashupati Seal, after Pashupati (lord of the beasts), an epithet of Shiva. While Marshall's work has earned some support, many critics and even supporters have raised several objections. Doris Srinivasan has argued that the figure does not have three faces, or yogic posture, and that in Vedic literature Rudra was not a protector of wild animals. Herbert Sullivan and Alf Hiltebeitel also rejected Marshall's conclusions, with the former claiming that the figure was female, while the latter associated the figure with Mahisha, the Buffalo God and the surrounding animals with vahanas (vehicles) of deities for the four cardinal directions. Writing in 2002, Gregory L. Possehl concluded that while it would be appropriate to recognize the figure as a deity, its association with the water buffalo, and its posture as one of ritual discipline, regarding it as a proto-Shiva would be going too far. Despite the criticisms of Marshall's association of the seal with a proto-Shiva icon, it has been interpreted by Jains and Buddhists as representing an early Tirthankara or an early Buddha.
Marshall hypothesized the existence of a cult of Mother Goddess worship based upon excavation of several female figurines, and thought that this was a precursor of the Hindu sect of Shaktism. However the function of the female figurines in the life of Indus Valley people remains unclear, and Possehl does not regard the evidence for Marshall's hypothesis to be "terribly robust". Some of the baetyls interpreted by Marshall to be sacred phallic representations are now thought to have been used as pestles or game counters instead, while the ring stones that were thought to symbolize yoni were determined to be architectural features used to stand pillars, although the possibility of their religious symbolism cannot be eliminated. Many Indus Valley seals show animals, with some depicting them being carried in processions, while others show chimeric creations. One seal from Mohen-jodaro shows a half-human, half-buffalo monster attacking a tiger, which may be a reference to the Sumerian myth of such a monster created by goddess Aruru to fight Gilgamesh.
In contrast to contemporary Egyptian and Mesopotamian civilizations, Indus valley lacks any monumental temples or palaces, even though excavated cities indicate that the society possessed the requisite engineering knowledge. This may suggest that religious ceremonies, if any, may have been largely confined to individual homes, small temples, or the open air. Several sites have been proposed by Marshall and later scholars as possibly devoted to religious purpose, but at present only the Great Bath at Mohenjo-daro is widely thought to have been so used, as a place for ritual purification. The funerary practices of the Harappan civilization is marked by its diversity with evidence of supine burial; fractional burial in which the body is reduced to skeletal remains by exposure to the elements before final interment; and even cremation. 
Collapse and Late Harappan
Around 1800 BCE, signs of a gradual decline began to emerge, and by around 1700 BCE, most of the cities were abandoned. In 1953, Sir Mortimer Wheeler proposed that the decline of the Indus Civilization was caused by the invasion of an Indo-European tribe from Central Asia called the "Aryans". As evidence, he cited a group of 37 skeletons found in various parts of Mohenjo-Daro, and passages in the Vedas referring to battles and forts. However, scholars soon started to reject Wheeler's theory, since the skeletons belonged to a period after the city's abandonment and none were found near the citadel. Subsequent examinations of the skeletons by Kenneth Kennedy in 1994 showed that the marks on the skulls were caused by erosion, and not violent aggression. Today, many scholars believe that the collapse of the Indus Civilization was caused by drought and a decline in trade with Egypt and Mesopotamia. It has also been suggested that immigration by new peoples, deforestation, floods, or changes in the course of the river may have contributed to the collapse of the IVC.
Previously, it was also believed that the decline of the Harappan civilization led to an interruption of urban life in the Indian subcontinent. However, the Indus Valley Civilization did not disappear suddenly, and many elements of the Indus Civilization can be found in later cultures. David Gordon White cites three other mainstream scholars who "have emphatically demonstrated" that Vedic religion is partially derived from the Indus Valley Civilizations.
Current archaeological data suggest that material culture classified as Late Harappan may have persisted until at least c. 1000–900 BCE and was partially contemporaneous with the Painted Grey Ware culture. Harvard archaeologist Richard Meadow points to the late Harappan settlement of Pirak, which thrived continuously from 1800 BCE to the time of the invasion of Alexander the Great in 325 BCE.
Recent archaeological excavations indicate that the decline of Harappa drove people eastward. After 1900 BCE, the number of sites in India increased from 218 to 853. Excavations in the Gangetic plain show that urban settlement began around 1200 BCE, only a few centuries after the decline of Harappa and much earlier than previously expected. Archaeologists have emphasized that, just as in most areas of the world, there was a continuous series of cultural developments. These link "the so-called two major phases of urbanization in South Asia".
A possible natural reason for the IVC's decline is connected with climate change that is also signalled for the neighbouring areas of the Middle East: The Indus valley climate grew significantly cooler and drier from about 1800 BCE, linked to a general weakening of the monsoon at that time. Alternatively, a crucial factor may have been the disappearance of substantial portions of the Ghaggar Hakra river system. A tectonic event may have diverted the system's sources toward the Ganges Plain, though there is complete uncertainty about the date of this event, as most settlements inside Ghaggar-Hakra river beds have not yet been dated. The actual reason for decline might be any combination of these factors. A 2004 paper indicated that the isotopes of sediments carried by the Ghaggar-Hakra system over the last 20 thousand years do not come from the glaciated Higher Himalaya but have a Sub-Himalayan source. They speculated that the river system was rain-fed instead and thus contradicted the idea of a Harappan-time mighty "Sarasvati" river. Recent geological research by a group led by Peter Clift investigated how the courses of rivers have changed in this region since 8000 years ago, to test whether climate or river reorganizations are responsible for the decline of the Harappan. Using U-Pb dating of zircon sand grains they found that sediments typical of the Beas, Sutlej and Yamuna rivers (Himalayan tributaries of the Indus) are actually present in former Ghaggar-Hakra channels. However, sediment contributions from these glacial-fed rivers stopped at least by 10,000 years ago, well before the development of the Indus civilization.
A research team led by the geologist Liviu Giosan of the Woods Hole Oceanographic Institution also concluded that climate change in form of the easterward migration of the monsoons led to the decline of the IVC. The team's findings were published in PNAS in May 2012. According to their theory, the slow eastward migration of the monsoons across Asia initially allowed the civilization to develop. The monsoon-supported farming led to large agricultural surpluses, which in turn supported the development of cities. The IVC residents did not develop irrigation capabilities, relying mainly on the seasonal monsoons. As the monsoons kept shifting eastward, the water supply for the agricultural activities dried up. The residents then migrated towards the Ganges basin in the east, where they established smaller villages and isolated farms. The small surplus produced in these small communities did not allow development of trade, and the cities died out.
In the aftermath of the Indus Civilization's collapse, regional cultures emerged, to varying degrees showing the influence of the Indus Civilization. In the formerly great city of Harappa, burials have been found that correspond to a regional culture called the Cemetery H culture. At the same time, the Ochre Coloured Pottery culture expanded from Rajasthan into the Gangetic Plain. The Cemetery H culture has the earliest evidence for cremation; a practice dominant in Hinduism today.
Historical context and linguistic affiliation
The IVC has been tentatively identified with the toponym Meluhha known from Sumerian records. It has been compared in particular with the civilizations of Elam (also in the context of the Elamo-Dravidian hypothesis) and with Minoan Crete (because of isolated cultural parallels such as the ubiquitous goddess worship and depictions of bull-leaping). The mature (Harappan) phase of the IVC is contemporary to the Early to Middle Bronze Age in the Ancient Near East, in particular the Old Elamite period, Early Dynastic to Ur III Mesopotamia, Prepalatial Minoan Crete and Old Kingdom to First Intermediate Period Egypt.
After the discovery of the IVC in the 1920s, it was immediately associated with the indigenous Dasyu inimical to the Rigvedic tribes in numerous hymns of the Rigveda. Mortimer Wheeler interpreted the presence of many unburied corpses found in the top levels of Mohenjo-Daro as the victims of a warlike conquest, and famously stated that "Indra stands accused" of the destruction of the IVC. The association of the IVC with the city-dwelling Dasyus remains alluring because the assumed timeframe of the first Indo-Aryan migration into India corresponds neatly with the period of decline of the IVC seen in the archaeological record. The discovery of the advanced, urban IVC however changed the 19th-century view of early Indo-Aryan migration as an "invasion" of an advanced culture at the expense of a "primitive" aboriginal population to a gradual acculturation of nomadic "barbarians" on an advanced urban civilization, comparable to the Germanic migrations after the Fall of Rome, or the Kassite invasion of Babylonia. This move away from simplistic "invasionist" scenarios parallels similar developments in thinking about language transfer and population movement in general, such as in the case of the migration of the proto-Greek speakers into Greece, or the Indo-Europeanization of Western Europe.
It was often suggested that the bearers of the IVC corresponded to proto-Dravidians linguistically, the breakup of proto-Dravidian corresponding to the breakup of the Late Harappan culture. Today, the Dravidian language family is concentrated mostly in southern India and northern and eastern Sri Lanka, but pockets of it still remain throughout the rest of India and Pakistan (the Brahui language), which lends credence to the theory. Finnish Indologist Asko Parpola concludes that the uniformity of the Indus inscriptions precludes any possibility of widely different languages being used, and that an early form of Dravidian language must have been the language of the Indus people. However, in an interview with the Deccan Herald on 12 August 2012, Asko Parpola clarified his position by admitting that "Sanskrit has also preserved a very important part of the Indus heritage" and that even Sangam Tamil had possible influences of the Brahmins .
Proto-Munda (or Para-Munda) and a "lost phylum" (perhaps related or ancestral to the Nihali language) have been proposed as other candidates for the language of the IVC. Michael Witzel suggests an underlying, prefixing language that is similar to Austroasiatic, notably Khasi; he argues that the Rigveda (composed by the Indo-Aryans after the decline of the Harappans) shows signs of this hypothetical Harappan influence in the earliest historic level, and Dravidian only in later levels, suggesting that speakers of Austroasiatic were the original inhabitants of Punjab and that the Indo-Aryans encountered speakers of Dravidian only in later times.
- List of Indus Valley Civilization sites
- List of inventions and discoveries of the Indus Valley Civilization
- Bronze Age
- Iron Age India
- Synoptic table of the principal old world prehistoric cultures
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