Chronological scaffold and takeaways

Detail

How to read this timeline

• The whole scaffold runs from c. 3.3 million years ago (mya) to c. 2600 BCE — about 3.3 million years. Written records cover only the last sliver of it.
• Dates in this era are approximate. They come from tools, fossils and soil layers, not from any text.
• Two units are used. "mya"/"ya" = years before today (used for deep prehistory). "BCE" = years before the Common Era (used once farming starts).
• Rough conversion: 12,000 ya ≈ 10,000 BCE. So 7000 BCE ≈ 9,000 years ago.

Deep time: first tools to first Indians (c. 3.3 mya – c. 1.2 mya)

• c. 3.3 mya — earliest stone tools. This is the moment hominins (early human-like species) become tool makers. Making a tool means planning ahead — you shape a stone now to use it later.
• c. 2 mya — Homo erectus walks out of Africa. The same date marks the oldest settlement in the Indian subcontinent. So India is part of the first human dispersal, not a late arrival.
• c. 1.5–1.7 mya — Attirampakkam (Tamil Nadu). It sits in the Korttalayar basin and is a key site of the South Indian (Madras) Lower Palaeolithic industry — the classic name for the earliest stone tool tradition of south India. [3]
• Diggers there traced the tools through the soil layers, from the lateritic basal gravels (the hard red gravel at the bottom) up to the loam (soft soil) on top. Oldest at the bottom, youngest on top. [3]
• The same site later shows the shift from Acheulian (big hand-axes) to Middle Palaeolithic (smaller flake tools) around 385,000 years ago, and Middle Palaeolithic use continues to about 172,000 years ago. Dates come from luminescence dating (measuring how long a buried grain of sand has been away from sunlight). [3]

• The Acheulian is the longest single tool tradition humans ever kept — over 1.5 million years. [3]

• c. 1.2 mya — Isampur (Karnataka). A limestone quarry-and-workshop site: early humans picked their raw stone here and shaped tools on the spot.

Our own species appears (c. 300,000 – c. 40,000 ya)

• c. 300,000 ya — Homo sapiens evolves in Africa.
• Fossils of at least five individuals from Jebel Irhoud, Morocco date to 300,000–350,000 years ago, placed in the earliest phase of Homo sapiens. [5]
• Dating used thermoluminescence on flints that had been burnt in ancient fires; the site range is 383,000–247,000 years. [5]

• Point for answers: the fossils are in north-west Africa, not only East Africa — so our species likely formed across Africa, not in one small homeland. [5]

• c. 125,000 ya — major sapiens exit from Africa. The big spread that eventually fills Asia, Europe, Australia and the Americas.

• 50,000–12,000 ya — sapiens reach Australia and the Americas. Australia needed sea crossings; the Americas needed a cold northern route. By the end of this window humans live on every continent except Antarctica.
• c. 40,000 ya — the last Neanderthals die out in Europe and South-West Asia. After this, Homo sapiens is the only human species left on earth. For most of the timeline above, several human species lived at the same time.

The Ice Age ends and everything speeds up (c. 12,000 ya – c. 4000 BCE)

• c. 12,000 ya — Ice Age ends. Warmer, wetter climate. This starts the Mesolithic (Middle Stone Age) and the first population explosion — more food, more people, smaller and sharper tools (microliths).
• c. 7000 BCE — Mehrgarh (on the Bolan river plain, Balochistan) is the earliest agricultural village of the subcontinent.
• Dug by a French–Pakistani team led by Jean-François Jarrige, first in 1974–1986, then again 1997–2000. [2]
• Barley was the main crop, with some wheat. [2]

• The site's layers run without a break from early Neolithic farming up into Bronze Age phases — so pottery, metal work and planned building can all be watched growing in one place. [2]

  Note: a 2025 radiocarbon study on human tooth enamel argues Mehrgarh's start should move from c. 8000 BCE down to about 5200 BCE. [2] The NCERT date of c. 7000 BCE is what to write in the exam; treat the revision as a live debate, not settled fact.

• 7000–5500 BCE — Pre-Harappan phase claimed at Bhirrana and Kunal (the chapter's dating).

• Bhirrana, Fatehabad district, Haryana: ASI has dug there since 2003 and found a 4.5 m thick cultural sequence — Hakra Ware, then Early Harappan, then Mature Harappan, stacked one above the other. [4]
• The lowest level gave a mean radiocarbon age of about 8.35 ± 0.14 thousand years BP; some readings push the settlement past 9,000 years BP, which would make Bhirrana the oldest settlement in the subcontinent. [4]

• Kunal (Haryana) is an Early Harappan site whose copper slags (the waste left after melting ore) have been studied to trace how smelting technology improved. [4]

• c. 4000 BCE — first copper; the Chalcolithic begins. "Chalcolithic" = the copper-and-stone age: people use copper tools but have not given up stone. Regional pottery styles appear — different areas now make pots that look different from each other.

Towards the first cities (c. 3500 – c. 2600 BCE)

• c. 3500 BCE — the base is laid for the Bronze Age Sindhu–Sarasvatī civilisation. Bronze = copper mixed with tin, harder than plain copper.
• c. 2500 BCE — two things happen together:
• Neolithic (New Stone Age, farming) communities are now spread across most of the subcontinent — so farming is no longer a north-west affair only.

• Early Harappan pottery and craft styles standardise — the many regional styles start looking alike. That sameness across a huge area is the warning bell for city life.

• c. 2600 BCE — Mature Harappan urban phase begins. This is India's First Urbanisation and the closing date of this scaffold.

The before/after-writing line

• More than 99% of human history is preliterate — no writing at all (Class 9, Ch 4 "Early Humans").
• For that 99%, everything known comes from artefacts (things people made and left behind).

• So every date is approximate, written as "c." (circa = about).

• Writing appears about 5,000 years ago in other parts of the world. In the subcontinent the script is the Sindhu lipi — and it is still undeciphered, so nobody can read it.

• Writing is the dividing line: prehistory (no readable records) → history (readable records). Because Sindhu lipi cannot be read, the Harappan cities sit in an awkward middle — they have writing, but it is silent for us.

Method takeaway

• Everything above rests on three legs:
• Tools — what was made, from what stone, in what style.
• Fossils — bones and teeth that show which species lived when.

• Experimental archaeology — archaeologists make copies of ancient tools and actually use them (cut meat, scrape hide, chop wood) to learn what the original was for and what marks it leaves.

• Prehistory is archaeology's domain end to end. No inscriptions, no coins, no texts — only dug-up material and laboratory dating.

Prelims Hooks

• Earliest stone tools: c. 3.3 mya; Homo erectus leaves Africa and reaches the Indian subcontinent: c. 2 mya.
• Attirampakkam is in Tamil Nadu (Korttalayar basin), dated c. 1.5–1.7 mya; Isampur is in Karnataka, c. 1.2 mya.
• Attirampakkam also records the Acheulian → Middle Palaeolithic shift at about 385,000 years ago, dated by luminescence. [3]
• Oldest Homo sapiens fossils: Jebel Irhoud, Morocco, 300,000–350,000 years ago, at least five individuals, dated by thermoluminescence on burnt flint. [5]
• c. 40,000 ya — last Neanderthals in Europe and South-West Asia.
• c. 12,000 ya — Ice Age ends; Mesolithic begins; first population explosion.
• Mehrgarh (Balochistan), c. 7000 BCE — earliest agricultural village; excavated by Jean-François Jarrige, 1974–86 and 1997–2000; main crop barley. [2]
• Bhirrana is in Fatehabad district, Haryana; ASI dug it from 2003; 4.5 m sequence of Hakra Ware → Early Harappan → Mature Harappan. [4]
• c. 4000 BCE — first copper, start of the Chalcolithic and of regional pottery styles.
• c. 2600 BCE — Mature Harappan urban phase = First Urbanisation; the script is Sindhu lipi, still undeciphered.

Mains Points

• Deep antiquity of the subcontinent's occupation. India is not a margin of human evolution but part of the earliest out-of-Africa spread at c. 2 mya, with Attirampakkam and Isampur as anchors. Attirampakkam's Middle Palaeolithic at 385,000 years ago raises a real debate: did that toolkit arrive with migrating sapiens, or develop locally among people already here? [3]
• The dating debate is itself examinable. Bhirrana's radiocarbon readings push settlement past 9,000 years BP [4] while a 2025 tooth-enamel study pulls Mehrgarh down to c. 5200 BCE [2]. Same region, opposite pulls. Use this to show that prehistoric chronology is provisional and moves with laboratory method — while keeping NCERT's dates as the baseline.
• From village to city is one unbroken chain, not a jump. Mehrgarh (c. 7000 BCE) → Hakra/Early Harappan (7000–5500 BCE) → copper and regional pottery (c. 4000 BCE) → standardised styles (c. 2500 BCE) → Mature Harappan cities (c. 2600 BCE). The standardisation step is the key argument: when pots across a huge area start matching, it signals shared craft training and exchange — the groundwork for urban life.
• Writing defines the limit of the evidence. With over 99% of human history preliterate, the historian's toolkit here is archaeological only — tools, fossils, experimental archaeology. The undeciphered Sindhu lipi means even the First Urbanisation cannot be read in its own words, so questions of language, rule and belief stay open.