The History of Sanatana Dharma: A Timeline

To ask how old Sanatana Dharma is, is to ask a question it was never built to answer. There is no founder to date, no single revelation, no first congregation. What we call the tradition is a long accumulation, layer upon layer, stretching across more than three thousand years and never quite discarding what came before. The Vedic fire altar, the forest sage, the temple tower, the wandering singer, the modern reformer at a Chicago podium: all of them are still here, folded into the same living thing. A history of it is less a single river than a watershed, many streams gathering into one name late in the day.

That name itself has a history. Sanatana Dharma (the eternal dharma, the way that sustains) is what the tradition has long called its own deepest principle. Dharma comes from the root dhṛ, to hold up or sustain, and it refuses to sit still inside English words like religion or duty. The phrase is old. It appears in the Manusmṛti and in the Puranas, meaning the eternal moral order. Its use as a name for the whole religion, however, is recent, a deliberate choice made in the nineteenth century. The other name, Hinduism, is older in its root and younger in its meaning. It begins with Sindhu, the Indus river of the Rigveda. Old Persian turned that sound into Hindu, and a Persian inscription of Darius I, around 518 BCE, already names the province of Hi[n]duš. For more than two thousand years afterward, Hindu meant simply the people and the land beyond the Indus. The English word Hinduism, and the idea of a single bounded religion behind it, were assembled in the early nineteenth century, often credited to the reformer Rammohan Roy and consolidated by colonial scholarship and the census. Scholars still argue about how much this matters. Some hold that Hinduism was largely a colonial construction. Others, such as David Lorenzen, point out that Hindus were already naming themselves against others, in their own languages, by the fourteenth century. The fair summary is that the word is modern, while the practices it gathers are very old.

Before the Vedas: the Indus cities (c. 2600–1900 BCE)

The oldest candidate for a beginning lies in the cities of the Indus, the Bronze Age civilisation that flourished across the river basin in its mature phase between about 2600 and 1900 BCE. It was vast, the most extensive urban culture of its age, with more than a thousand known sites and great planned cities at Mohenjo-daro, Harappa, Dholavira and Rakhigarhi. The temptation to find Hinduism here is strong. A seated horned figure on one steatite seal, surrounded by animals, was identified by John Marshall in 1928 to 1929 as an early form of Shiva in the posture of a yogi, the lord of beasts, Paśupati. Other finds have been read as early goddess worship, sacred bathing, or the veneration of the pipal tree.

The honest position is that we do not know. The Indus script has never been deciphered, so every religious reading rests on the resemblance of an image to something attested only thousands of years later. Later scholars, among them Doris Srinivasan and Wendy Doniger, have questioned whether the horned figure is Shiva at all, or even male. The tradition often claims an unbroken line from these cities to the temple of today. The record can show resemblance, and it can show a long gap, and it cannot yet show derivation. The Indus civilisation belongs to the prehistory of the region. Whether it belongs to the history of Sanatana Dharma is a question the evidence has so far left open.

The Vedic age (c. 1500–500 BCE)

The firm ground begins with the Vedas. The Rigveda, the oldest of the four, is usually dated to around 1500 to 1200 BCE, a collection of 1,028 hymns in praise of gods such as Agni, the deified fire, Indra the warrior, and Varuṇa, the keeper of ṛta, the cosmic and moral order. These were not written. They were śruti, that which is heard, carried by memory with a precision so exacting that elaborate methods of permuted recitation were used as a built-in check against error. In 2003 UNESCO recognised this tradition of Vedic chanting as a masterpiece of humanity’s oral heritage, and noted that of more than a thousand branches of recitation only about thirteen survive.

The heart of Vedic life was yajña, the fire sacrifice, an exchange between the human and divine worlds conducted at the altar. How this culture arrived is one of the most debated questions in the field. The mainstream view holds that Indo-Aryan language and Vedic religion entered the subcontinent through gradual migrations of pastoralists after about 2000 BCE, a position now supported by ancient genetic studies published in 2019. A minority view holds that the Vedic people were indigenous. The older and cruder idea of an Aryan invasion, a military conquest, has largely been set aside in favour of slow migration and mixture. Max Müller, the great Victorian Sanskritist whose word Aryan was later so badly abused, was careful to insist it described a language and never a race. Of the Vedas themselves he wrote, in 1882, that “if I were asked under what sky the human mind has most fully developed some of its choicest gifts, I should point to India.”

The turn inward: the Upanishads (c. 800–400 BCE)

Somewhere in the centuries around 800 to 400 BCE the tradition turned from the altar to the self. The Upanishads, the closing philosophical layer of the Veda, are called Vedānta, the end of the Veda. Patrick Olivelle, whose edition is the scholarly standard, dates the two oldest, the Bṛhadāraṇyaka and the Chāndogya, to roughly 800 to 500 BCE. Here the great words first appear: brahman, the ground of all being, and ātman, the innermost self, and the teaching that the two are one. The Chāndogya gives the formula tat tvam asi, that thou art. The Bṛhadāraṇyaka gives ahaṃ brahmāsmi, I am brahman. With them come the ideas that would organise everything after: karma, action and its fruit, saṃsāra, the round of rebirth, and mokṣa, release from it.

This was an age of questioning across the region. The same centuries produced the śramaṇa movements, the strivers who shared the vocabulary of karma and liberation while rejecting the authority of the Vedic sacrifice. From them came Buddhism and Jainism. The dates of the Buddha are themselves disputed, the traditional reckoning placing his death around 483 BCE and a revised scholarly chronology closer to 400 BCE. What matters is that Sanatana Dharma took its classic shape in conversation with these rivals, defining itself in part by what it affirmed and they denied: the authority of the Veda.

The great synthesis: epics, Gita, and law (c. 200 BCE–500 CE)

The recognisable shape of classical Hinduism emerged in the long period between the late Upanishads and the Gupta empire, what Gavin Flood calls the Hindu synthesis. The acceptance of the Veda became the line dividing the orthodox, āstika, from the heterodox, nāstika. Into this period fall the two great epics. The Mahābhārata, ascribed to Vyāsa and composed in layers between roughly 400 BCE and 400 CE, runs to more than a hundred thousand verses, the longest poem in the world. Set within it, in eighteen chapters and seven hundred verses, is the Bhagavad Gītā, the song of Krishna and Arjuna on the edge of battle that became, for many, the heart-text of the tradition. The Rāmāyaṇa of Vālmīki took shape across a similar span. Edwin Arnold’s Victorian rendering of the Gita carried its teaching into English: “Never the spirit was born; the spirit shall cease to be never.”

This was also the age of the law books, the Dharmaśāstra, of which the Manusmṛti is the most famous, composed in the early centuries around the turn of the era. It set out the orders of society, varṇa, and the stages of life, āśrama, in an idealised scheme. It is worth saying plainly that this was one prescriptive text among several, a statement of Brahmanical aspiration rather than a description of how every community actually lived. Under the Gupta rulers, from about 320 CE, came a flowering of Sanskrit poetry, mathematics and temple building that later writers, with some exaggeration, named a golden age. Romila Thapar cautions that the phrase flattens a society that was regional, varied and steeply hierarchical.

Temples, Puranas and the rise of devotion (c. 500–1200 CE)

In the second half of the first millennium the centre of gravity shifted again, from sacrifice toward devotion and the temple. The eighteen great Purāṇas, composed mostly between about 500 and 1000 CE, carried the gods of classical Hinduism to the people in story: the Trimūrti of Brahmā, Vishnu and Shiva, and the three great streams of worship, Vaishnava, Shaiva and Shākta. Stone temples rose under the Pallava, Chola and Chalukya kings, and the act of worship moved increasingly toward pūjā, the honouring of the image of the deity.

This was the age of the systematic philosophies, the six darśanas, and of the first great theologians. Adi Shankara, whose Advaita Vedanta taught the non-duality of self and brahman, is placed by tradition around 788 to 820 CE and by much current scholarship a little earlier, in the eighth century. In the Tamil south, the Āḻvār and Nāyaṉār poet-saints, between the sixth and ninth centuries, poured out an intense personal love of Vishnu and of Shiva in their own language, the first great surge of bhakti in the historical record. Their songs shaped Rāmānuja, the theologian of qualified non-dualism, who lived around the turn of the twelfth century and gave Vaishnava devotion its philosophical backbone.

The age of the saints and the meeting with Islam (c. 1200–1750)

Islam came to the subcontinent over centuries, first to Sindh in 711 CE, then with the Delhi Sultanate from 1206 and the Mughal empire from 1526. The encounter was long, uneven, and resists the simple story of two sealed worlds at war. The historian Richard Eaton notes that contemporary Sanskrit inscriptions usually named the newcomers by their ethnic label, Turk, rather than by religion, and that the neat division of Indian history into a Hindu period and a Muslim period was largely a later, colonial invention. There was real conflict, including the desecration of temples, of which Eaton documents about eighty attested cases between 1192 and 1729, most of them political acts against the shrines of defeated kings rather than expressions of a doctrine of destruction. There was also patronage, repair and coexistence, including Mughal support for the temple at Puri.

Out of this period came the second great wave of bhakti, now in the languages of the north. Kabir, the weaver-poet who belonged fully to neither tradition, Mirabai with her songs to Krishna, Tulsidas who retold the Rama story in Hindi, Chaitanya in Bengal, Guru Nanak whose path became Sikhism: these singers carried devotion past the boundaries of caste and learning to anyone who could sing. Of the divine, beyond all names, Kabir said in Tagore’s translation, “there are no words to tell that which He is.”

The colonial encounter and the Hindu renaissance (c. 1750–1947)

British rule brought a new kind of attention. The Orientalist scholars, Sir William Jones who founded the Asiatic Society in 1784 and proposed the kinship of Sanskrit, Greek and Latin, and Max Müller who edited the vast Sacred Books of the East, recovered and translated the classical canon, and in doing so helped fix a textual, golden-age image of the tradition that Indians too began to adopt. Against the pressure of missionary criticism and colonial rule, a generation of reformers reshaped the tradition’s account of itself. Rammohan Roy founded the Brahmo Sabha in 1828 and campaigned against satī. Dayananda Saraswati founded the Arya Samaj in 1875 with the cry “back to the Vedas.” Ramakrishna’s disciple Vivekananda carried a confident Vedanta to the West, and his address to the World’s Parliament of Religions in Chicago on 11 September 1893 opened, famously, “Sisters and Brothers of America.”

It is in exactly this period that Sanatana Dharma became a name for the religion as a whole. Traditionalists, the Sanatanis, took up the ancient phrase to describe themselves and to mark their distance from the reformers. The Central Hindu College textbook of 1903, produced by Annie Besant with Bhagavan Das, bore the title Sanatana Dharma. The phrase was old. Its work as the proper name of a religion was new. This is the single most common confusion in the whole subject, and it is worth holding clearly: that the tradition is ancient does not mean it always called itself by this name.

A global tradition (1947 to today)

With independence in 1947 and the constitution of 1950, Sanatana Dharma entered the life of a modern secular republic, its personal law reformed through the Hindu Code Bills of the mid-1950s drafted under B. R. Ambedkar. In the same decades it became a global presence. Yogananda’s Autobiography of a Yogi appeared in 1946, Prabhupada founded ISKCON in New York in 1966, and the practice of yoga spread across the world, until the United Nations marked an International Day of Yoga, first observed on 21 June 2015. By the Pew Research Center’s 2025 figures, there are close to 1.2 billion Hindus, about fifteen percent of humanity, making it the third largest religion after Christianity and Islam, and the fourth largest group worldwide once the religiously unaffiliated are counted. The great majority of Hindus live in India and Nepal.

A note on dates and certainty

Two ways of telling this story run side by side, and it is best not to confuse them. The tradition speaks of the Vedas as apauruṣeya, without human author, eternal and revealed, and of the events of the epics as literal history in a vast cycle of ages. The historical record, working from language, archaeology and text, sees datable human compositions in layers, and treats the grand chronologies as sacred reckoning rather than calendar fact. A. L. Basham called the traditional date of 3102 BCE for the start of the present age quite impossible as history. Neither way of telling is the enemy of the other. One measures meaning, the other measures time. This timeline has kept to the second, and almost every date in it is an estimate, offered in the spirit in which scholars offer them, as the best available reading of incomplete evidence. The tradition itself, in the end, is less interested in when it began than in what it has carried, unbroken in feeling if not in fact, from the fire altar to the present hour.