The Bronze Age: Indus Valley Civilisation

The Indus Valley Civilisation was the Bronze Age culture that built the first cities of South Asia. It grew along the Indus River and nearby rivers in what is now Pakistan and north west India. Its people planned their towns, built covered drains, used standard weights and made fine seals and beads. This post explains when it existed, where its main cities were, how people lived and why it faded.

Our older post on this topic was hard to read and stated some debated dates as settled fact. We have rewritten it in simple English and checked each point against standard sources.

What Was the Bronze Age?

The Bronze Age is the period when people learned to make tools and objects from copper and from bronze, a mix of copper and tin. It came after the long Stone Age, when tools were made of stone. You can read about that earlier time in our post on the Stone Age.

In the Indian subcontinent, the Bronze Age is linked above all with the Indus Valley Civilisation, also called the Harappan Civilisation after its first excavated city, Harappa.

When Did It Exist?

Scholars usually date the civilisation from about 3300 BCE to 1300 BCE. Its mature phase, when the great cities flourished, ran from about 2600 BCE to 1900 BCE.

Historians divide it into three stages:

• Early Harappan: farming villages grow into towns.
• Mature Harappan: large planned cities, trade and writing.
• Late Harappan: cities shrink and people move to smaller settlements.

The roots go back further. Neolithic farming villages such as Mehrgarh in Balochistan show early farming in the region. By the Early Harappan stage, villagers grew peas, sesame, dates and cotton, and kept animals such as the water buffalo. Indus farmers were among the earliest known cotton growers, a story we tell in our post on cotton cultivation.

A Note on Very Early Dates

Some excavators have suggested much older dates for a few sites, such as Bhirrana in Haryana, based on a small number of charcoal samples. Other scholars question these dates and the methods used. Until there is wider agreement, the usual dates above remain the standard.

How Big Was It?

The Indus Valley Civilisation was one of the four great early centres of civilisation, together with ancient Egypt, Mesopotamia and China. It covered a larger area than Egypt and Mesopotamia combined.

More than a thousand Mature Harappan sites have been reported and nearly a hundred have been excavated. Large cities such as Harappa and Mohenjo Daro may have held between 30,000 and 60,000 people each. The whole civilisation may have had between one and five million people at its height.

The Main Cities

Scholars list five major urban centres:

• Mohenjo Daro in Sindh, Pakistan, a UNESCO World Heritage Site since 1980.
• Harappa in the Punjab, Pakistan, the first site to be excavated.
• Ganeriwala in the Cholistan Desert, Pakistan.
• Dholavira in Kutch, Gujarat, a UNESCO World Heritage Site since July 2021.
• Rakhigarhi in Haryana, one of the largest Harappan settlements.

Dholavira stands on Khadir Bet island in the Great Rann of Kutch. It is famous for a clever system of stone channels and large reservoirs that stored water in a dry land. Some reservoirs were cut directly into rock. This shows how carefully the Harappans planned for water.

Other well studied sites in India include Lothal in Gujarat. The Archaeological Survey of India believes Lothal may have had one of the earliest known docks in the world, linked to an old course of the Sabarmati River.

Lothal was a busy craft and trade town. Excavators found a bead factory with living rooms and a large work courtyard, and a coppersmith workshop with several furnaces. Beads and gems from Lothal were in demand in lands to the west.

How the Cities Were Built

Indus cities were carefully planned. Streets were laid out in a regular pattern. Houses were built of baked bricks of standard sizes. Many houses had a room set aside for bathing, and waste water flowed into covered drains that ran along the main streets.

Most homes opened onto inner courtyards and small lanes rather than onto the busy main road. Some cities had a raised, walled area that archaeologists call a citadel. Large buildings that may have been granaries have also been found.

The Great Bath

At Mohenjo Daro stands one of the most famous structures of the ancient world, the Great Bath. It is a large, well built tank made watertight with fitted bricks. It may have been a public bath, perhaps used for ritual bathing.

Unlike Egypt and Mesopotamia, the Indus cities have no clear palaces or grand temples. This has led some scholars to think that power may have been shared among merchants, priests or city councils, though the truth is still unknown.

Daily Life, Craft and Trade

Most city people seem to have been traders or craft workers. They lived in neighbourhoods with others who did the same work. They made pottery, copper and bronze tools, shell bangles, and glazed faience beads.

Weights and measures were highly standardised across a huge area. This suggests strong trade rules. Small square seals made of steatite, a soft stone, carry images of animals and short lines of signs. They were probably used to mark goods or show ownership.

Indus goods travelled far. Etched carnelian beads and Harappan style weights and seals have been found in sites in Iran and Mesopotamia, showing links with distant markets.

The Indus Script

The Indus people used a set of signs that appear on seals, pottery and tablets. At Dholavira, a large row of signs may once have hung over a gate as a signboard. Most inscriptions are very short, often about five signs.

The script has never been deciphered, so we do not know what language the people spoke. Some scholars favour a link with the Dravidian language family, but this is not proven.

How It Was Discovered

The Archaeological Survey of India was founded in 1861. Decades later, under its director John Marshall, the archaeologist Daya Ram Sahni excavated the mounds at Harappa. Further south, R. D. Banerji studied Mohenjo Daro in 1922 and 1923 and noticed objects that matched those from Harappa. By 1924 Marshall was convinced that a new and very old civilisation had been found, and he announced it to the world.

After the partition of 1947, most of the known sites lay in Pakistan. Indian archaeologists then explored many new sites in India, including Dholavira, Rakhigarhi and Lothal.

Between 1954 and 1958 alone, more than fifty Harappan sites were excavated in Kutch and Saurashtra in Gujarat. These digs pushed the known map of the civilisation far to the south and east of the Indus itself.

Why the Civilisation Declined

Around 1900 BCE the great cities began to shrink. There was no single sudden end. Many scholars link the decline to a slow drying of the climate, which reduced water supply and pushed people to move east toward the Ganga plains.

Life did not stop. People moved into smaller villages, and some older traditions carried on. In the upper Ganga region, the Ochre Coloured Pottery culture, usually dated about 2000 to 1500 BCE, shows links with the Late Harappans. The Copper Hoard objects found in the same region are often discussed with it.

What Came After

After the Bronze Age cities faded, the Vedic period followed in north India. Read about it in our post on the Vedic Society. More than a thousand years later, new cities rose in the Ganga plains under the states described in our post on the Mahajanpadas. Historians call this the second urbanisation of India.

Visitors can see Indus objects at the National Museum in New Delhi and at site museums such as the one at Lothal. Seeing the small seals and beads up close shows the skill of these early craft workers.

Students should remember a few key terms: Harappa, Mohenjo Daro, Great Bath, steatite seals, standard weights and undeciphered script. Together they sum up what makes this civilisation special.

What We Changed From the Old Post

The old post used strange word swaps and was hard to follow. We rewrote it in clear English with headings and lists.

We added the three phases, the five major cities, UNESCO listings, town planning details, the Great Bath, standard weights, seals, the undeciphered script, the discovery story and the main reasons for decline.

We removed quotes we could not verify and treated very early dates for Bhirrana as debated rather than settled.

Frequently Asked Questions

How old is the Indus Valley Civilisation?

It is usually dated from about 3300 BCE to 1300 BCE, with its mature city phase from about 2600 BCE to 1900 BCE.

Which Indus sites are in India?

Important Indian sites include Dholavira and Lothal in Gujarat, Rakhigarhi and Bhirrana in Haryana, and Kalibangan in Rajasthan.

Has the Indus script been read?

No. The script is still undeciphered, so the language of the Indus people is unknown.

Why is it called the Bronze Age?

Because its people made and used tools and objects of copper and bronze, along with stone and other materials.