Deep time · c. 2500 BCE
The Indus Valley
Harappan
Planned cities older than the Vedas — and an undeciphered script, so its social order is genuinely unknown.
Timeline
One society, along its length
Eight illuminated plates along four thousand years — the same arc Nandalal Bose painted into the Constitution, here in photographs from the free archives. Turn through them, then read the full length below.
Deep time · c. 1380 BCE
The Mitanni treaty
Boğazköy
Indo-Aryan gods invoked in Rigvedic order — a dated, external fixed point for the spread of the language.
Classical · 5th c. BCE
The Buddha
Sarnath
A teaching that rejected Vedic sacrifice and birth-hierarchy — the tradition Ambedkar would return to in 1956.
Classical · c. 250 BCE
Ashoka's edicts
Mauryan
An ethic of dhamma inscribed across the subcontinent — and the capital that became the emblem of the Republic.
Freedom · 1932
The Poona Pact
The Communal Award
Gandhi fasted against separate electorates; under pressure Ambedkar signed for reserved seats instead — allies clashing over means.
Freedom · 1947
Ambedkar takes the chair
Constituent Assembly
He chairs the Drafting Committee — the labour that would invert the old order, clause by clause.
Founding · 25 Nov 1949
The Constitution adopted
Constituent Assembly
Three years' work, handed over and adopted by the Assembly.
The Republic · 26 Jan 1950
In force
1950
The new code comes into force — equality before the law, in force to this day.
The full length
Every entry, tagged and dated
One society, read along its length — from a Bronze Age treaty that first pins Indo-Aryan speech, through the classical law of the Dharmaśāstra, the colonial reforms, and the founding of the Republic, to the arguments running on your feed today. Every entry is tagged and dated. Where a traditional date and the evidence-based date differ, we say so — that gap is itself part of the lesson.
Deep time
- c. 2600–1900 BCE
The Indus Valley Civilisation
Harappa, Mohenjo-daro and Rakhigarhi flourish — planned drainage, standardised weights, long-distance trade. Its script is undeciphered, so its social order is genuinely unknown; claims that it was 'Vedic' or that it was casteless are both unproven. Ancient DNA from a Rakhigarhi individual (~2500 BCE), sequenced by Indian institutions, shows zero steppe ancestry.
- c. 2000–1500 BCE
Steppe ancestry arrives
Ancestry from Central Asian steppe pastoralists enters South Asia, correlating with the spread of Indo-Aryan languages and carrying the Y-lineage R1a-Z93. Migration and admixture over centuries — not an invasion, and not a caste. Kept on three separate tracks: genes, language, and caste.
- c. 1380 BCE
The Mitanni treaty
A treaty between the Mitanni and Hatti (found at Boghazköy) invokes Indo-Aryan gods in Rigvedic order — Mitra, Varuṇa, Indra, Nāsatya. An external, dated fixed point for the spread of Indo-Aryan speech.
Classical order
- c. 5th c. BCE
The Buddha
The Buddha's teaching rejects Vedic sacrifice and birth-based hierarchy. Centuries later, Ambedkar would read the origin of untouchability through the 'Broken Men' who stayed Buddhist — and would himself convert in 1956.
- c. 250 BCE
Ashoka's edicts
The Mauryan emperor Ashoka inscribes an ethic of dhamma — restraint, tolerance, welfare — on rock and pillar across the subcontinent. The lion capital of Sarnath later becomes the emblem of the Republic.
- c. 2nd c. BCE – 3rd c. CE
The Manusmṛti is composed
The Mānava-Dharmaśāstra reaches its form over several centuries — a legal-religious code fixing varna duties, graded punishment, and the disabilities of Shudras and those outside varna. Its traditional ascription to a primeval 'Manu' is a claim of authority, not a date.
- c. 100 BCE – 250 CE
The Tamil Sangam poems
Some 2,300 poems by around 500 poets — merchants, cultivators, soldiers, kings and women, Brahmins present but not dominant — form a Tamil literary tradition parallel to Sanskrit, before the fourfold Vedic order closed over the south. The legendary 'three academies' are a later medieval tale; the poems, and their social breadth, are real.
Medieval & early modern
- c. 320–550 CE
The Gupta Empire
Often called a classical 'golden age' of art, science and Sanskrit letters — and also the period in which the Dharmaśāstra and Puranic varna order was consolidated and elaborated. Splendour and caste hardening are the same era, not opposites.
- c. 6th–9th c. CE
Tamil Bhakti begins
The Alvars and Nayanars launch a devotional movement in the Tamil country that reaches across caste to God directly — an early current of anti-hierarchical religion from inside the tradition, not outside it.
- c. 1030 CE
Alberuni documents caste
The scholar Al-Biruni, travelling with Mahmud of Ghazni, devotes a chapter to 'the castes, called colours (varṇa), and the classes below them.' He records the four varnas, the Antyaja service groups beneath the Shudra, and the Chaṇḍāla and Ḍoma 'not reckoned amongst any caste' — untouchability, described by an outside witness some 800 years before British rule.
- 12th c. CE
Basava & the Lingayats
In Karnataka, Basava and the Vīraśaiva (Lingayat) sharanas reject caste, priestly monopoly and temple ritual, composing vachanas in the people's language. A frontal anti-caste challenge mounted from within Hindu devotion.
- c. 1193 CE
The fall of Nalanda
Bakhtiyar Khalji's force storms a fortified Buddhist monastery-town in Bihar; the monks are killed and a great library lost. A real catastrophe — but the source records 'large numbers of books,' not the viral '9 million,' and describes the fort at Bihar (Odantapuri), often conflated with Nalanda.
- 1206 CE
The Delhi Sultanate
Turko-Afghan rule is established across much of northern India. Caste society persists under new rulers — the chroniclers (Minhaj, later Barani) describe a social order that the sultanate governs over rather than dissolves.
- 14th c. CE
Three schools, one gate still shut
Medieval learning runs in three channels. The Islamic madrasa: Firoz Shah Tughlaq endows dozens of colleges, among them the Madrasa-e-Fīrūz Shāhī at Hauz Khas (c. 1352). The Brahmanical Sanskrit tol at Mithila, Nadia and Kashi — still birth-gated, transmitted Brahmin to Brahmin. And the Bhakti/Sant poets, who make a vernacular literacy the low-caste and untouchable could share precisely because the Sanskrit door stayed shut to them.
- c. 1357 CE
Barani's Tārīkh-i-Fīrūz Shāhī
Ziauddin Barani writes one of the great Indo-Persian histories — and argues for a rigid, birth-based social hierarchy of his own, evidence that graded-rank thinking was not unique to the Dharmaśāstra. A chronicle from the 14th century, read critically.
- 15th c. CE
Kabir, Ravidas & northern Bhakti
Ramananda's circle — above all Kabir (a weaver) and Ravidas (a leather-worker) — preach a devotion that dismisses caste and ritual outright. Ravidas is claimed to this day by Dalit communities as their own voice.
- 1469–1539
Guru Nanak & the founding of Sikhism
Guru Nanak rejects caste distinction and ritual hierarchy; the institution of the langar — the common kitchen where all eat together regardless of rank — is a direct answer to caste commensality rules.
- 1526 CE
The Mughal Empire
Babur founds the Mughal state; under Akbar it reaches an accommodation with Hindu society. Caste continues as the substrate of social life beneath imperial administration.
- c. 1590 CE
The Ā'īn-i-Akbarī
Abul Fazl's great survey of Akbar's empire divides society into ordered classes and devotes a book to the learning and law of the Hindus 'who form the bulk of the population' — a Mughal administrator's record of the same graded social order.
- 6 June 1674
Shivaji's coronation
Shivaji is crowned at Raigad — but only after a pandit is brought from Varanasi and a Kshatriya genealogy supplied, because ritual kingship was barred to those of lower varna. The same caste gatekeeping he had to overcome is rarely mentioned by those who claim him today.
- 1757 CE
The Battle of Plassey
The East India Company's victory begins the transition from trading power to territorial ruler in Bengal — the hinge from Mughal India to the colonial state whose reforms and codifications fill the next era.
- 1772 onward
Dharmaśāstra becomes 'Hindu law'
Under Warren Hastings, the Company decides Hindus will be judged in personal matters by their own śāstric law — and commissions translations of the Dharmaśāstra (Halhed, then Jones and Colebrooke) to run its courts. This is how Manu and its kin acquired real legal force in the modern era — the very code the Constitution and the Hindu Code Bill would later displace.
Colonial record
- 1813
The Charter Act admits missionaries
The 'pious clause' finally lets Christian missionaries into Company India — and the same Act makes the first state commitment to education (one lakh of rupees a year). Mission schools (Madras 1805, Vizag 1806) expand until they number ~3,778 in the Madras Presidency by 1901, reaching castes and girls the old order barred from learning.
- 1829
Sati outlawed in Bengal
The Bengal Sati Regulation makes the burning of widows a criminal offence, following the campaign associated with Raja Ram Mohan Roy and Governor-General Bentinck.
- 1843
Slavery abolished in India
The Indian Slavery Act, 1843 ends the legal status of slavery in British India. Note the common mix-up: the 1807 Act abolished the British slave TRADE, not slavery in India — a wrong-date myth worth catching.
- 11 Apr 1850
Caste Disabilities Removal Act
The earliest statutory crack in the old code: Act XXI of 1850 orders that no one shall forfeit property or inheritance 'by reason of… being deprived of caste' or renouncing a religion. In plain terms, the colonial courts would no longer enforce the śāstric penalty of stripping the excommunicated or the convert of their rights — a full century before Article 17, a law refusing to carry out one caste sanction.
- 1854
Wood's Education Despatch
The 'Magna Carta of English education in India' repudiates Macaulay's downward-filtration and commits the state, on paper, to a graded system of mass and vernacular education — founding the education departments and, in 1857, the first universities. The promise ran well ahead of the delivery.
- 1856
Hindu widow remarriage legalised
The Hindu Widows' Remarriage Act legalises the remarriage of widows, associated with the campaign of Ishwar Chandra Vidyasagar.
- 1813–1859
The Channar cloth revolt
In Travancore, lower-caste Nadar women were forbidden to cover their breasts. After decades of struggle and violent backlash, a royal proclamation of 26 July 1859 grants them the right to an upper cloth — caste enforced on the body, and fought off it.
- 1882
The Hunter Education Commission
The Empire's first great education review. Jyotirao Phule submits a memorandum demanding free compulsory schooling for lower-caste children; the Commission recommends that indigenous schools 'be open to all irrespective of caste' and that the state help draw in the depressed classes — a state body recommending the admission of castes that had been barred.
- 1891
Age of Consent Act
The Age of Consent Act raises the age of consent to 12. It is often mislabelled a 'child-marriage ban' — that restraint came later, with the Sarda Act of 1929.
- 1909
Separate electorates introduced
The Morley–Minto reforms introduce separate electorates for Muslims — a mechanism later extended and central to debates over 'divide and rule' and to the 1932 dispute over the Depressed Classes.
Freedom & founding
- 27 Jan 1919
Ambedkar's first constitutional demand
Before the Southborough (Franchise) Committee, a 28-year-old Ambedkar gives evidence demanding that the Depressed Classes be recognised as a distinct political category with their own representation — because on a uniform franchise a permanent minority would never be heard. It is his earliest documented constitutional argument: the same claim he would carry, unbroken, to States and Minorities (1947) and into Article 17.
- 16 Sep 1921
India's first reservation — the Madras Communal G.O.
The Justice Party government of the Raja of Panagal issues the first Communal Government Order, apportioning public posts across communities — non-Brahmin, Brahmin, Muslim, Christian and Anglo-Indian, and the Scheduled Castes. Born of the South's Non-Brahmin movement and its education-and-office grievance, it is reservation twenty-nine years before the Constitution makes it national.
- 1924–25
The Vaikom Satyagraha
For twenty months, activists court arrest to open the public roads around the Vaikom Mahadeva Temple to avarna castes, who were barred even from walking near it. T. K. Madhavan, K. P. Kesava Menon and Periyar E. V. Ramasamy lead it; Gandhi negotiates in 1925. Three of the four roads open — the first crack that leads, eleven years later, to the Travancore Temple Entry Proclamation.
- 25 Dec 1927
Ambedkar burns the Manusmṛti
At Mahad, after asserting the right of untouchables to draw water from the Chavdar tank, Ambedkar and his co-workers publicly burn a copy of the Manusmṛti — a deliberate rejection of the old code. One end of this site's thesis.
- 1929
Child Marriage Restraint (Sarda) Act
The Sarda Act sets minimum marriage ages — the actual restraint on child marriage, distinct from the 1891 consent law.
- 1932
Communal Award & the Poona Pact
The Communal Award grants separate electorates to the Depressed Classes; Gandhi fasts against it; the Poona Pact replaces them with reserved seats inside the general electorate. A clash between allies over means, both claiming the same end.
- 1935
Government of India Act
The last major colonial constitution and, in structure, a direct ancestor of the 1950 document — much of its administrative machinery carried over.
- 12 Nov 1936
Travancore Temple Entry Proclamation
The 24-year-old Maharaja Chithira Thirunal opens every state temple in Travancore to all Hindus regardless of caste — legally ending the avarna temple-bar fourteen years before Article 17, and the fruit of the Vaikom (1924–25) and Guruvayur satyagrahas. Gandhi called it 'the great wonder of modern times.' A piece of the new code written before the Constitution — by a Hindu king, from inside the tradition.
- 15 Mar 1947
Ambedkar's States and Minorities
Months before he takes the drafting chair, Ambedkar submits States and Minorities to the Fundamental Rights Sub-Committee on behalf of the Scheduled Castes Federation — a 'mini-constitution' of rights and safeguards, arguing that declaring rights is worthless without remedies to enforce them. The bridge from the grievance he had lived to the remedy he would draft.
- 29 Aug 1947
Ambedkar chairs the Drafting Committee
Weeks after independence, the Constituent Assembly elects B. R. Ambedkar Chairman of the Drafting Committee. The burden of drafting will fall largely on him.
- 26 Nov 1949
The Constitution is adopted
After 2 years, 11 months and 18 days of work, the Assembly adopts the Constitution. The day before, Ambedkar delivers his warning against the 'grammar of anarchy' and hero-worship.
The Republic
- 26 Jan 1950
The Constitution comes into force
India becomes a republic. Untouchability is abolished (Art. 17); equality before law (Art. 14) and non-discrimination (Art. 15) replace graded rank. The new code is in force.
- 1955
Untouchability made an offence
The Untouchability (Offences) Act — later the Protection of Civil Rights Act — puts criminal teeth on Article 17.
- 1953–55
First Backward Classes Commission (Kalelkar)
The Constitution (Art. 340) provides for a commission to identify 'backward classes'. The first, under Kaka Kalelkar, reports in 1955 with a list of 2,399 backward castes. In an extraordinary turn, Kalelkar's own covering letter pleads against his report — he had come to doubt caste as the basis for remedy. The government shelves it. The OBC question is left open for a generation.
- 1955–56
The Hindu Code Bill enacted
After Ambedkar resigned in 1951 over the stalled original bill, Parliament passes it in stages — the Hindu Marriage Act, Hindu Succession Act and related laws — reforming marriage, divorce and women's inheritance.
- 14 Oct 1956
Ambedkar embraces Buddhism
At Nagpur, Ambedkar and hundreds of thousands of followers convert to Buddhism — his chosen exit from caste, and pointedly into an Indian-origin tradition. He dies weeks later, on 6 December 1956.
- 1973
Kesavananda Bharati: the 'basic structure'
The Supreme Court holds that Parliament's power to amend the Constitution (Art. 368) is real but not unlimited — it cannot alter the document's 'basic structure'. Lawful amendment has a boundary, drawn by the courts.
- 1980
The Mandal Commission report
The second Backward Classes Commission, under B. P. Mandal, reports that OBCs are about 52% of the population, identifies 3,743 backward castes, and recommends 27% reservation for them in central jobs and education. Shelved for a decade, it is implemented in 1990 by the V. P. Singh government — triggering fierce nationwide protest, and then the Supreme Court's balancing act in Indra Sawhney (1992).
- 1989
SC/ST (Prevention of Atrocities) Act
A dedicated law criminalising atrocities against Scheduled Castes and Scheduled Tribes — protection that does not extend to OBCs, a distinction often blurred.
- 1992
Indra Sawhney (Mandal)
The Supreme Court upholds 27% OBC reservation while capping total reservation at 50% and excluding the 'creamy layer'. The same year, the Babri Masjid is demolished on 6 December.
- 2005
Daughters made equal coparceners
The Hindu Succession (Amendment) Act gives daughters the same rights as sons in ancestral property — closing the largest gap the 1956 Act had left, half a century on.
Now
- 2013
Manual scavenging outlawed — again
The Prohibition of Employment as Manual Scavengers Act criminalises the hereditary bondage of specific castes to handling human waste and animal carcasses — the 'polluting' labour the old code fixed on those outside varna. That the law was needed in 2013, and that the work persists, measures how much of the old code still survives the new one.
- 2019
103rd Amendment — EWS quota
A 10% reservation for the economically weaker sections is added by constitutional amendment — lawful under Article 368, and itself genuinely contested. Upheld 3:2 by the Supreme Court in 2022.
- 9 Nov 2019
The Ayodhya title verdict
The Supreme Court awards the disputed Ayodhya site to the deity Ram Lalla on the balance of possessory evidence — while recording that the 1949 idol placement and 1992 demolition were unlawful. It did not hold that a temple was proven demolished for the mosque.
- 2023
The Bihar caste survey
Bihar publishes a state caste-based survey of its ~13.07 crore people — the first major modern state caste count, and the model others would follow. It reports Backward and Extremely Backward Classes together at 63.1% (EBC 36.0%, OBC 27.1%), Scheduled Castes 19.7%, Scheduled Tribes 1.7%, and 'upper'/General castes 15.5%. The numbers reopened the reservation debate nationally.
- 2024
Sub-classification of SCs allowed
A seven-judge bench permits states to sub-classify Scheduled Castes so benefits reach the most disadvantaged within the category — the Madiga-vs-Mala question, now settled constitutionally.
- 2024–25
The Telangana caste survey
Telangana releases its Social, Educational, Employment, Economic & Caste Survey (SEEEPC), covering about 96.9% of households — a rare recent caste enumeration in a country whose census has not counted caste beyond SC and ST since 1931. It records 242 communities and reports Backward Classes at 56.3% of the state (including roughly 10% BC-Muslims), Scheduled Castes 17.4%, Scheduled Tribes 10.5%, and forward or other castes 15.8%. The findings sharpened the national argument over whether the census should count caste again.
- 2015 · tabled 2025
Karnataka's contested survey
Karnataka's Socio-Economic and Education Survey — conducted in 2015 under H. Kantharaj, covering 10.6 million households at a cost of ₹162 crore — is finally tabled in Cabinet in April 2025, but never formally published. Its leaked findings — that the dominant Lingayat and Vokkaliga communities are smaller than long assumed, while SC/ST and backward classes are larger — are politically contested, and a fresh survey was ordered. The survey's existence is documented; its specific caste figures remain disputed.
- 2025 → Census 2027
Caste returns to the national Census
The Union Cabinet decides (30 April 2025) to enumerate caste in the next national Census — the first time caste beyond Scheduled Castes and Tribes will be counted nationally since 1931. The census is to run in two phases (from October 2026 in the Himalayan states, from March 2027 elsewhere), recording each person's specific jati. Ninety-four years after the last full caste count, the state proposes to measure the very order the Constitution set out to unmake.
- Oct 2025
“Bhimsmriti, not Manusmṛti”
The two-codes framing enters mainstream politics: the contrast between Ambedkar's Constitution and the Manusmṛti is invoked publicly at the level of national commemoration. The argument this site maps is a live one.
Entries are data — add or edit them in src/data/timeline.json. Where a traditional date differs from the evidence-based one, the entry is tagged [Debated] and says so. More entries (including verified colonial-reform dates and contemporary court citations) are being added as sourcing is confirmed; see Method.