Chapter 4
Timeline and Sources of History
Opening Quote & The Big Questions
"History is 'an unending dialogue between the present and the past … between the society of today and the society of yesterday. … We can fully understand the present only in the light of the past.'"
— E.H. Carr (British historian)
The chapter opens with a photograph of the National Museum, New Delhi — institutions that preserve statues, coins, and ornaments which help us understand our history.
- How do we measure historical time?
- How can various sources help us understand history?
- How did early humans live?
How Do We Learn About the Past?
What is the earliest memory you can recollect? Those memories together are a part of your past. How does understanding the past help us understand the present world?
History is defined by NCERT as the study of the human past.
The Earth has a very, very long history, of which we humans occupy only a tiny part — the most recent one.
| 4.54 Billion years ago | Earth formed |
| ~4 Billion years ago | First cells |
| 2.33 Billion years ago | Atmospheric oxygen |
| ~1 Billion years ago | Bacteria established |
| 700 Million years ago | Sponges and fungi |
| 500 Million years ago | Corals appear |
| ~450 Million years ago | Fish & Vertebrates |
| ~400 Million years ago | Insects & Amphibians |
| 300 Million years ago | Reptiles & Dinosaurs |
| ~200 Million years ago | Birds; Mammals |
| 100 Million years ago | Flowers and bees |
| 10,000,000 years ago | Primates |
| 1,000,000 years ago | Fire (use of fire) |
| 300,000 years ago | Homo sapiens (Modern humans) |
| 6,500 years ago | Writing develops |
The chart uses THREE colour-coded scales: Billion years ago (light blue), Million years ago (dark blue), Years ago (green). This distinction is frequently tested in MCQs.
Scholars Who Study the Past
NCERT introduces four key categories of scholars who help us uncover the Earth's and humanity's past:
| Geologists | Study the physical features of the Earth — soil, stones, hills, mountains, rivers, seas, and oceans. |
| Palaeontologists | Study the remains of plants, animals and humans from millions of years ago in the form of fossils. |
| Anthropologists | Study human societies and cultures from the oldest times to the present. |
| Archaeologists | Study the past by digging up remains — tools, pots, beads, figurines, toys, bones, teeth, burnt grains, parts of houses or bricks. |
How Is Time Measured in History?
Each society and culture has had its own ways of measuring time. Major events — such as the birth of an important person or the start of a ruler's reign — have often marked the beginning of a new era.
The Gregorian calendar is now commonly used worldwide. It has 12 months adding up to 365 days, and a leap year every four years. However, century years (e.g., 1800, 1900, 2000) are leap years only if they are multiples of 400. So among 1800, 1900 and 2000 — only 2000 is a leap year.
Side by side, Hindu, Muslim, Jewish, Chinese and other calendars are also used for calculating dates of festivals and auspicious events.
| Old Notation | AD (Anno Domini — Latin, 'In the year of the Lord') and BC (Before Christ) |
| New Notation | CE (Common Era) and BCE (Before Common Era) — used globally now |
| Starting point | The conventional year of Jesus Christ's birth |
| CE — counted | Forward from the birth of Jesus. Example: 1947 CE = India's independence |
| BCE — counted | Backward from the birth of Jesus. Example: 560 BCE = approximate birth of Gautama Buddha |
| No Year Zero | In the Gregorian calendar, year 1 CE follows immediately after year 1 BCE. There is NO year zero. |
To calculate years between a BCE date and a CE date: Add both numbers and subtract 1.
Example from NCERT: Buddha born 560 BCE, current year 2024 CE → 560 + 2024 − 1 = 2,583 years ago.
Why subtract 1? Because there is no year zero — year 1 CE directly follows year 1 BCE.
Timeline — Concept & Landmark Events
A timeline is a convenient tool to mark events, showing a sequence of dates and events covering any particular period. It helps understand the order in which historical events take place — even without knowing exact dates.
The timeline clearly shows that the birth of Buddha (560 BCE) occurs before the birth of Jesus, even without looking at dates.
NCERT notes: The dotted portion marks a skipped period; otherwise this timeline would have to be almost 3 metres long!
| 12,000 BCE | End of last Ice Age |
| 10,000 BCE | (Marker on timeline) |
| 8,000 BCE | First settlements and beginning of agriculture |
| 6,000 BCE | Pottery technology in Indian Subcontinent; World's first cities in Mesopotamia |
| 4,000 BCE | Beginning of copper metallurgy; Indus-Sarasvatī civilisation |
| 2,000 BCE | (Marker — Indus-Sarasvati civilisation flourishes) |
| 560 BCE | Birth of Gautama Buddha (approximate) |
| ~268 BCE | Reign of Aśhoka |
| ~1 CE / BCE | Birth of Jesus |
| 2000 CE | "We are here" — present day |
Century and Millennium (DON'T MISS OUT)
Along with a year and a decade (10 years), two terms are important for history:
| Century | Any period of 100 years. Counted every 100 years starting from year 1 CE. Currently: 21st century CE (2001–2100). BCE centuries are counted backward from 1 BCE. Example: 3rd century BCE = 300 BCE to 201 BCE. |
| Millennium | Any period of 1,000 years. Currently: 3rd millennium CE (began 2001 CE, ends 3000 CE). BCE millenniums go backward from 1 BCE. Example: 1st millennium BCE = 1 BCE to 1000 BCE. Plural: millenniums or millennia (both correct). |
- The 21st century CE runs from 2001 to 2100, NOT from 2000 to 2099.
- The 3rd century BCE = 300 BCE to 201 BCE (going backwards).
- If Chandragupta II was born in 380 CE, he belongs to the 4th century CE (301–400 CE).
- Rani of Jhansi born in 1828 → belongs to 19th century CE; independence was in 1947 → 1947 − 1828 = 119 years before independence.
- "12,000 years ago" → subtract from approx current year (2024): = ~10,000 BCE.
Indian Calendars & Pañchānga (DON'T MISS OUT)
Many Indian calendars rely on the positions of the sun and moon to define the months of the year.
A Pañchānga is a book of tables which lists the days of each month along with related astronomical data. It precisely predicts:
- Solar and lunar eclipses
- Times for sunrise and sunset
- Weather predictions for the year
- Dates and timings of festivals
Pañchāngas are still widely used in India.
The word "auspicious" is defined in NCERT as: favourable or bringing luck (e.g., 'an auspicious beginning'). Indian calendars are used specifically for calculating dates of festivals and auspicious events.
Sources of History — All Categories
A source of history is defined by NCERT as: a place, person, text or an object from which we gather information about some past event or period.
Every object or structure tells a story and is like a piece in a jigsaw puzzle. In the case of history, quite a few pieces of the puzzle may remain missing!
- Inscriptions: Manuscripts, copper plates, coins
- Structures: Monuments, mounds
- Excavations: Human/animal/plant remains, tools & weapons, figurines & ornaments, pottery & toys, habitations & burials
- Indian Literature: Vedas & Itihasas, poems & plays, historical texts, collection of stories, scientific & technological texts
- Foreign Accounts: Travelogues, historical chronicles
- Oral Sources: Genealogical, folklore
- Paintings
- Sculptures
- Panels
- Studies of ancient climates
- Chemical studies of excavated materials
- Genetics of ancient people
- Newspapers (for recent history)
- Electronic media (TV, internet) — last few decades
- Historians — study and write about the past
- Archaeologists — excavate remains
- Epigraphists — study ancient inscriptions
- Anthropologists — study human societies and cultures
- Experts in literature and languages
In the last 50 years, scientific studies have increasingly contributed to reconstruction of the past.
When sources confirm each other — the jigsaw pieces match. When sources give contradictory information — historians must decide which source to trust more. This is how they re-create the history of the period they are studying.
Archaeological Sources in Detail
| Inscriptions | Written records engraved on hard surfaces. Include manuscripts (hand-written texts), copper plates, and coins. |
| Structures | Monuments (temples, forts, tombs) and mounds (raised land formed by accumulated debris of past settlements). |
| Excavations — Organic remains | Human, animal, and plant remains (bones, teeth, burnt grains, seeds). |
| Excavations — Artefacts | Tools and weapons; figurines and ornaments; pottery and toys. |
| Excavations — Settlement evidence | Habitations (floors, walls, bricks) and burials (graves, burial goods). |
Literary Sources in Detail
| Vedas & Itihasas | Ancient Indian religious and epic literature. Itihasas = epics like Mahabharata and Ramayana. |
| Poems & Plays | Literary works that reflect the society, culture, and events of their time. |
| Historical Texts | Chronicles, biographies of rulers (e.g., Harshacharita), accounts of battles and kingdoms. |
| Collection of Stories | E.g., Panchatantra, Jataka tales — reflect social conditions of their era. |
| Scientific & Technological Texts | Works on medicine (Charaka Samhita), mathematics, astronomy, metallurgy. |
| Foreign Accounts | Travelogues (travel accounts by foreign visitors like Fa Hien, Ibn Battuta) and Historical Chronicles written by foreign scholars. |
| Oral Sources | Genealogical accounts (family lineages passed down orally) and Folklore (folk songs, legends, stories passed through generations). |
Oral & Artistic Sources
| Paintings | Cave paintings (e.g., Bhimbetka) and murals on temple/palace walls provide evidence of social life, activities, and beliefs. |
| Sculptures | Stone, metal, or terracotta figures reveal artistic traditions, religious beliefs, and the appearance of rulers and deities. |
| Panels | Narrative relief panels on stupas, temples (e.g., Sanchi Stupa panels) depict historical events and daily life. |
| Genealogical (Oral) | Family tree / lineage information preserved orally — important for reconstructing royal succession and social history. |
| Folklore (Oral) | Folk tales, songs, legends passed down generations; reflect popular memory of historical events. |
The Beginnings of Human History — Early Humans
Modern humans (Homo sapiens) have walked the planet for about 300,000 (three lakh) years. This is only a tiny fraction of the Earth's history.
- Lived in bands or groups to help each other; faced many challenges from nature.
- Were mainly hunters and gatherers — relied on hunting animals and collecting edible plants and fruits.
- Lived in temporary camps, rock shelters or caves.
- Communicated using languages that are now lost.
- Used fire; made improved stone axes, blades, arrowheads, and other tools.
- Had certain beliefs about natural elements and possibly a notion of afterlife.
- Created rock paintings in hundreds of caves all over the world — some show simple figures or symbols; others depict scenes with animals or humans.
- Made simple ornaments — stone or shell beads, pendants made of animal teeth — and sometimes exchanged them with other groups.
According to Fig. 4.3 (NCERT Timeline), the first examples of rock art in the world date to 40,000 BCE. The Ice Age lasted from over 100,000 years ago to around 12,000 years ago.
The First Crops & Agricultural Communities
Over long ages, the Earth's climate went through many changes. During Ice Ages, much of the Earth was covered with ice. The last Ice Age lasted from over 100,000 (one lakh) years ago to around 12,000 years ago.
- Climate warmed up; ice partly melted → waters swelled existing rivers and drained into oceans.
- Humans started settling down and cultivating cereals and grains.
- Also domesticated animals — cattle, goats, etc.
- Communities grew in size and settled near rivers (water availability + fertile soil → easier crop growth).
- Social complexity increased — leaders / 'chieftains' emerged, responsible for the people's welfare.
- Initially, no individual ownership — lands collectively sowed and harvested.
- Hamlets grew into sizeable villages that exchanged goods — mostly food, clothing, and tools.
- Networks of communication and exchange were established.
- Some villages grew into small towns.
- New technologies: Pottery (pots and clay objects); use of metal (copper first, iron later) → durable tools, ornaments.
- This stage prepared for the emergence of 'civilisation' (discussed in Chapter 6).
NCERT notes that in pictures of early humans in rock shelters and agricultural communities, men and women are given certain roles. While they may appear to be 'natural', they are not necessarily accurate and do not cover all situations.
For instance, women may have helped prepare colours for rock painting, or may have done some of the painting. Men may have done some cooking or helped take care of children.
Key lesson: We have only limited information about early human societies — we must be careful about assumptions.
Complete Glossary of Key Terms (Exam Critical)
| History | The study of the human past. |
| Era | A distinct period of time. |
| Gregorian Calendar | The calendar now used worldwide; 12 months, 365 days, leap year every 4 years. Century years are leap years only if multiples of 400. |
| CE (Common Era) | Years counted forward from the conventional birth of Jesus; replaces 'AD'. |
| BCE (Before Common Era) | Years counted backward from the birth of Jesus; replaces 'BC'. |
| Decade | A period of ten years. |
| Century | A period of 100 years. 21st century CE = 2001–2100. |
| Millennium | A period of 1,000 years. 3rd millennium CE = 2001–3000. Plural: millenniums / millennia. |
| Auspicious | Favourable or bringing luck (e.g., 'an auspicious beginning'). |
| Timeline | A tool showing a sequence of dates and events covering a particular period. |
| Source of History | A place, person, text or an object from which we gather information about a past event or period. |
| Fossils | Impressions of footprints, or parts of plants or animals preserved within layers of soil or rocks. |
| Geologist | Studies physical features of the Earth — soil, stones, hills, mountains, rivers, seas, oceans. |
| Palaeontologist | Studies remains of plants, animals, and humans from millions of years ago (fossils). |
| Anthropologist | Studies human societies and cultures from oldest times to present. |
| Archaeologist | Studies the past by digging up remains — tools, pots, beads, bones, etc. |
| Epigraphist | Scholars who study ancient inscriptions. |
| Historian | A person who studies and writes about the past. |
| Genetics | Branch of biology studying how features/characteristics pass from one generation to the next. |
| Pañchānga | A book of tables listing days of each month with astronomical data — predicts eclipses, sunrise/sunset, festivals, weather. |
| Afterlife | A life that begins after death. |
| Hunters & Gatherers | People who hunt animals and collect edible plants/fruits for survival (not agriculturalists). |
| Ice Age | Period when much of Earth was covered with ice. Last Ice Age: ~100,000 years ago to ~12,000 years ago. |
| Hamlet | A small settlement or small village. |
| Welfare | Health, prosperity and well-being. |
| Homo sapiens | Modern humans; have existed for approximately 300,000 years. |
| Itihasas | Indian epics (Mahabharata, Ramayana) — a literary source of history. |
| Travelogue | An account of travels written by a visitor — an important foreign account as source of history. |
Key Takeaways — Before We Move On (NCERT)
- We have explored some ways to learn more about our pasts. The concept of a timeline helps us understand the sequence of historical events at different times.
- There are different ways of measuring time: years, decades, centuries, millenniums.
- Sources of history are many; they help us reconstruct and interpret historical events.
- We have also had a brief look into the lives of early humans and how human societies grew more complex in time.
- Q1: Write the history of your family using sources of history at your disposal.
- Q2: Can we compare historians to detectives? Yes — both gather evidence, cross-check sources, and try to reconstruct a complete picture from incomplete clues.
- Q3 Dates chronologically: 1900 BCE → 323 BCE → 100 BCE → 100 CE → 323 CE → 1090 CE → 2024 CE.
- Q3 King Chandragupta born 320 CE: Belongs to 4th century CE (301–400 CE). Years after Buddha's birth: 320 + 560 − 1 = 879 years.
- Q3 Rani of Jhansi born 1828: 19th century CE. Years before independence (1947): 1947 − 1828 = 119 years.
- Q3 "12,000 years ago" as a date: 2024 − 12,000 = approx 10,000 BCE (or 9,976 BCE precisely using the rule).
MCQ Practice — Chapter 4
30 Questions · Timeline & Sources of History · UPSC / State PCS Level
Instructions: Click "Show Answer & Explanation" under each question to reveal the correct option (highlighted in green) and the explanation. Use "Reveal All" to expand everything at once.
Show Answer & Explanation
- AAncient monuments and fossils
- BThe human past✓
- CThe physical features of the Earth
- DHuman societies and their culture only in modern times
Show Answer & Explanation
- AGeologist
- BAnthropologist
- CPalaeontologist✓
- DEpigraphist
Show Answer & Explanation
- A1800
- B1900
- C2000✓
- D2100
Show Answer & Explanation
- AChristian Era and Before Christian Era
- BCommon Era and Before Common Era✓
- CCurrent Epoch and Before Current Epoch
- DCalculated Era and Before Calculated Era
Show Answer & Explanation
- A2,584 years ago
- B2,583 years ago✓
- C1,464 years ago
- D2,582 years ago
Show Answer & Explanation
- A2000 CE to 2099 CE
- B2001 CE to 2100 CE✓
- C2000 CE to 2100 CE
- D2001 CE to 2099 CE
Show Answer & Explanation
- A300 BCE to 201 BCE✓
- B301 BCE to 200 BCE
- C300 BCE to 200 BCE
- D299 BCE to 200 BCE
Show Answer & Explanation
- A1st millennium CE
- B2nd millennium CE
- C3rd millennium CE✓
- D4th millennium CE
Show Answer & Explanation
- AAn ancient Indian epic
- AAn ancient Indian epic
- BA book of tables listing days of each month with astronomical data✓
- CA type of inscription on copper plates
- DA tool used by archaeologists for excavation
Show Answer & Explanation
- AMounds
- BCopper plates
- CTravelogues✓
- DHabitations and burials
Show Answer & Explanation
- AArchaeologists
- BEpigraphists✓
- CNumismatists
- DPalaeographers
Show Answer & Explanation
- A1 million years
- B300,000 years (three lakh years)✓
- C10,000 years
- D4.54 billion years
Show Answer & Explanation
- A300,000 BCE
- B14,000 BCE
- C40,000 BCE✓
- D8,000 BCE
Show Answer & Explanation
- A300,000 years ago to 40,000 years ago
- BOver 100,000 years ago to around 12,000 years ago✓
- C50,000 years ago to 8,000 years ago
- D200,000 years ago to 20,000 years ago
Show Answer & Explanation
- AMetalworking and trading
- BPottery making and weaving
- CHunting and gathering✓
- DPastoralism and nomadism only
Show Answer & Explanation
- A10,000 years ago
- B300,000 years ago
- C6,500 years ago✓
- D1 million years ago
Show Answer & Explanation
- AArchaeological Sources
- BArtistic Sources
- COral Sources (under Literary Sources)✓
- DForeign Accounts
Show Answer & Explanation
- AIron
- BBronze
- CCopper✓
- DGold
Show Answer & Explanation
- AOnly written records from which we gather information
- BPhysical remains of past civilisations
- CA place, person, text or an object from which we gather information about some past event or period✓
- DGovernment records and official documents only
Show Answer & Explanation
- APaintings
- BSculptures
- CPanels
- DTravelogues✓
Show Answer & Explanation
- AFor fishing and boat transport only
- BFor water availability and fertile soil that made crop growing easier✓
- CFor defence against enemies
- DBecause rivers provided metal ores
Show Answer & Explanation
- AThe branch of biology that studies how features pass from one generation to the next✓
- BThe study of ancient languages
- CThe study of fossils
- DThe study of ancient climates
Show Answer & Explanation
- A8,000 BCE
- B4,000 BCE to 2,000 BCE✓
- C560 BCE
- D2,000 CE
Show Answer & Explanation
- AThey had developed agriculture and needed cooperative farming
- BTo help each other face many challenges from nature✓
- CThey were forced to by chieftains
- DTo engage in trade with each other
Show Answer & Explanation
- AA tool that shows a sequence of dates and events covering any particular period✓
- BA list of all historical rulers with their dates
- CA chart showing only BCE dates
- DA type of inscription found in archaeological excavations
Show Answer & Explanation
- AGeologist — studies fossils
- BPalaeontologist — studies physical features of Earth
- CAnthropologist — studies human societies and cultures✓
- DArchaeologist — studies genetic lineages of ancient people
Show Answer & Explanation
- AOwned by the chieftain alone
- BDivided equally among all families
- CCollective — no sense of individual ownership; lands collectively sowed and harvested✓
- DSold and purchased freely in markets
Show Answer & Explanation
- A4 years
- B3 years✓
- C2 years
- D5 years
Show Answer & Explanation
- A1,000 BCE to 2,000 BCE
- B1 BCE to 1,000 BCE✓
- C1 CE to 1,000 CE
- D500 BCE to 1,500 BCE
Show Answer & Explanation
- ABirth of Jesus → Birth of Buddha → End of last Ice Age → Homo sapiens appear
- BHomo sapiens appear → End of last Ice Age → Birth of Buddha → Birth of Jesus✓
- CEnd of last Ice Age → Homo sapiens appear → Birth of Jesus → Birth of Buddha
- DBirth of Buddha → Homo sapiens → Birth of Jesus → End of last Ice Age


