History of Buddhism: Founder, Origins and Timeline

By Tim Yu, Founder & Editor · Published 4 June 2026 · Updated 10 November 2026

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The history of Buddhism begins with its founder, Siddhārtha Gautama, the Buddha, who taught in the Ganges plain of ancient India some 2,400 to 2,600 years ago. His exact dates are debated: the Theravada tradition’s own chronology puts his life at about 624–544 BCE, older scholarship at about 560–480 BCE, and many scholars now hold, the Stanford Encyclopedia of Philosophy notes, that he died around 405 BCE (the evidence is weighed in the historical Buddha). From the community he gathered, Buddhism unfolded into a family of traditions followed across Asia and, today, the world.

This is the story of how a regional teaching became one of humanity’s great religions, told without favouring any one branch.

Because Buddhism never had a single head or a single canon, its history is less a straight line than a spreading river. What follows is a chronological map of the main phases, with the honest gaps and live debates left visible rather than smoothed over.

Origins: The Buddha and the First Community (5th c. BCE)

Buddhism began with the life and teaching of the Buddha, a renunciant who taught in the small kingdoms and republics of the eastern Ganges plain — the region of modern Bihar and Uttar Pradesh, near the Nepal border.

His dates are genuinely uncertain, and an honest history has to say so. Until recently, his dates were usually put at about 560–480 BCE, while the Theravada tradition’s own chronology is earlier still, about 624–544 BCE. More recently, however, many scholars have argued for a later range: in the Stanford Encyclopedia of Philosophy’s words, many “now hold that he must have died around 405 BCE.” The two pictures differ by roughly a century. What they agree on is that he lived to around eighty and taught for some forty-five years. Anyone who offers a single confident birth year is overstating what the evidence allows.

The traditional Theravada date for the Buddha’s passing, 544 BCE, is still in use: the Buddhist Era (BE) counts from it (countries differ by a year in reckoning its start), and the Royal Thai Embassy in Berlin heads its 2026 holiday list “Official Holidays B.E. 2569 (2026).” Our Buddhist Era converter turns BE years into CE ones, country by country.

What the Buddha left behind was not a book but a community — the Sangha of monks and, later, nuns, together with a body of lay followers. (For what that renunciant life involves to this day — including why monastics shave their heads and wear ochre robes, how one is ordained, a day in the monastery, and the alms round — see the life of a Buddhist monk.) He framed his teaching, according to the early discourses, around the Four Noble Truths and a path to the end of suffering (SN 56.11), and he refused to set himself up as an indispensable authority: in the Mahāparinibbāna Sutta he tells Ānanda that “the Realized One doesn’t think” he will “lead the mendicant Saṅgha,” and urges him to “live as your own island, your own refuge, with no other refuge. Let the teaching be your island and your refuge” (DN 16, trans. Sujato). In the Kālāma Sutta he tells his listeners not to go by oral transmission or lineage, or by the thought that “the ascetic is our respected teacher,” but to give things up “when you know for yourselves” that they are blameworthy, “criticized by sensible people,” and lead to harm (AN 3.65). That emphasis — on a path to be tested rather than a creed to be believed — shaped everything that came after. (On what has drawn people into that renunciant community ever since, see why Buddhists become monks.)

For the first centuries, the teaching was preserved orally, memorised and chanted by the monastic community. This matters for the history: the texts we have were written down generations later (the Pali canon, by the Mahāvaṃsa’s account, only in Sri Lanka under King Vaṭṭagāmaṇi, whose reign its translator Wilhelm Geiger dates to the 1st century BCE), and the earliest layers were already being interpreted and organised by the community before they were fixed in writing.

Early Development: Councils and the First Schisms

After the Buddha’s death — his parinibbāna — the community faced an obvious problem: how to preserve and agree on what he had taught. Tradition answers this with a series of Buddhist councils, gatherings of monks convened to recite and settle the teaching and the monastic discipline (Vinaya).

The First Council is traditionally said, in the Pali Vinaya’s own account (Kd 21), to have met at Rājagṛha during the first rains retreat after the Buddha’s death, to recite his discourses and rules collectively. The Second Council, held a hundred years later at Vesālī (Vaishali) in the same Vinaya’s account (Kd 22), dealt with disputes over monastic discipline: ten relaxations of the rules proclaimed by the local monks, among them accepting gold and silver.

It is around this period that the community’s first lasting division appears. The early Sangha split into two broad groupings: the Sthaviravāda (the “Elders,” Pali Theravāda) and the Mahāsāṅghika (the “Great Community”). In the Sri Lankan Mahāvaṃsa, the monks defeated at the Second Council founded the Mahāsāṅghika; scholars debate the exact cause and timing — whether it turned on points of discipline, on doctrine, or on both — but the split is real, and from these roots further subdivisions grew. Later tradition speaks of some “eighteen schools” of early Buddhism; the number is schematic rather than exact, and the Mahāvaṃsa itself counts eighteen, then says “other schools arose afterwards” and names eight more, six in India and two in Sri Lanka. Most of these “mainstream” schools later died out; the Theravāda of Sri Lanka and Southeast Asia is the principal survivor of this early layer, which is why its scriptures preserve so much of the oldest material.

The honest summary: Buddhism was internally diverse almost from the beginning. The neat modern map of “branches” is the downstream result of these very early divergences.

Ashoka: The Great Patron (3rd c. BCE)

One of the great turning points in Buddhism’s early spread was the patronage of one ruler. Ashoka (reigned c. 270–232 BCE; the exact dates are disputed) was the Mauryan emperor who, by his own account in his thirteenth Rock Edict, felt “deep remorse” after the carnage of his conquest of Kalinga and came to hold that “conquest by Dhamma” (Sanskrit dharma) is “the best conquest.” Ven. S. Dhammika, the edicts’ translator, adds that “it seems” Ashoka had been calling himself a Buddhist for at least two years before the war, though his commitment was “only lukewarm and perhaps had a political motive behind it”; after it, he “dedicated the rest of his life trying to apply Buddhist principles to the administration of his vast empire.”

The “Beloved-of-the-Gods” speaking in the edict is Ashoka: Dhammika explains that Asoka was his given name and that the title he assumed was Devanampiya Piyadasi, “Beloved-of-the-Gods, He Who Looks On With Affection” — hence the third person. What pained him most, he says, was not the scale of the killing alone but what conquest does to the devout and the decent caught up in it, and to everyone who sees a friend or relative suffer:

The casualty figures he recorded, and the rest of what he had carved across the empire, are set out on Ashoka’s own page.

In Dhammika’s words, Ashoka “had a crucial part to play in helping Buddhism to spread both throughout India and abroad, and probably built the first major Buddhist monuments.” The Sri Lankan chronicle, the Mahāvaṃsa, credits him with monasteries in eighty-four thousand cities and with shrines (stupas) at the places the Buddha had visited — and, crucially, he looked outward: he “sent teaching monks to various regions in India and beyond its borders,” and his thirteenth Rock Edict claims the conquest by Dhamma as far as Tamraparni, which Dhammika glosses as an old name for Sri Lanka. The Sinhalese chronicle tradition remembers his son Mahinda carrying the teaching to Sri Lanka, where it took deep and lasting root. The same Theravāda chronicles credit Ashoka with sponsoring a Third Council at Pāṭaliputra, presided over by the elder Moggaliputta Tissa, to purify the Sangha. It is a Theravāda tradition: the northern Buddhist accounts have no separate council under Ashoka, and the chronicle’s translator, Wilhelm Geiger, judged that they had “mistakenly fused the two into one,” merging it with the Second.

This is the moment a regional Indian tradition began to become an international one. (The wider story of that diffusion is told in how Buddhism spread.)

The Rise of Mahayana (c. 1st c. BCE – early CE)

Around the turn of the millennium, a major new movement began to take shape within Indian Buddhism: the Mahāyāna, the “Great Vehicle.”

The dating is one of the genuine debates of the field, so it deserves a careful word. New sutras presenting themselves as the Buddha’s word — including the Prajñāpāramitā (“Perfection of Wisdom”) texts — were circulating by the 1st or 2nd century CE at the latest: a Kharoṣṭhī manuscript of a Perfection of Wisdom text, closest to the Eight Thousand Lines, has been carbon-dated to between 47 and 147 CE, and since it was copied from an earlier manuscript, 84000’s translators suggest the text itself is older, possibly from the 1st or 2nd century BCE; Lokakṣema’s Chinese version of the Eight Thousand dates to 179 CE. The movement developed gradually over centuries and did not announce itself with a single founding event. For a long time it coexisted within the same monasteries as the older schools rather than forming a separate institution.

What distinguished the emerging Mahayana was, above all, the ideal of the bodhisattva — one who vows to attain full buddhahood for the sake of liberating all beings — and an expanded vision of what a buddha ultimately is. Two great philosophical systems gave it intellectual depth:

• Madhyamaka (“Middle Way”), associated with the philosopher Nāgārjuna — dated to about 150–250 CE by the Stanford Encyclopedia of Philosophy, whose entry reports “unanimous agreement” that he is the most important Buddhist philosopher after the historical Buddha. Madhyamaka developed the teaching of śūnyatā, emptiness.
• Yogācāra (“Yoga practice,” also called “mind-only”), a later system associated with Asaṅga and Vasubandhu (around the 4th–5th centuries CE), brothers or half-brothers in the traditional accounts, which analysed the role of consciousness in experience.

These did not replace earlier Buddhism so much as branch from it. The older, non-Mahayana traditions continued — and one of them, the Theravāda, survives to this day.

How the two families now differ is set out side by side in Theravada vs Mahayana.

Spread Across Asia: Sri Lanka, Southeast Asia, and the Silk Road (1st c. CE onward)

From its Indian heartland, Buddhism spread in two broad directions, and the differences in what spread help explain the map of Buddhism today.

Southward and southeast. From Sri Lanka — where, in the chronicles’ account, the mission led by Ashoka’s son Mahinda had planted it — the Theravada tradition spread through much of mainland Southeast Asia over the following centuries, becoming dominant in Myanmar in the late 11th century and in Cambodia and Laos by the 13th and 14th centuries (Britannica). This is why Sri Lanka, Myanmar, Thailand, Cambodia, and Laos are predominantly Theravāda today. In Thailand, Laos and Cambodia its local home is the wat, a temple and monastery in one compound.

Northward along the Silk Road. This was the great corridor of transmission. The trade routes linking India to Central Asia and China carried merchants, monks, and manuscripts. The Kushan empire, which straddled these routes in the first centuries CE, ruled the region of Gandhāra (in present-day Pakistan and Afghanistan), which became a great centre of Buddhist art and learning; the Chinese pilgrim Xuanzang records the great stupa and the monasteries that tradition credits to its king Kanishka. It was here, and at Mathura further east, that some of the first human images of the Buddha were made in the Kushan period: the Cleveland Museum of Art dates a Gandhāran relief of the Buddha’s miracle at Shravasti to about 100 CE, and a seated Buddha from Mathura, which it calls “this early form of the Buddha image,” to about 120 CE. In the art historian Dorothy Wong’s account, giant Buddha statues also began in north-western India and spread along the Silk Road, from Bamiyan in Afghanistan to Nara in Japan.

Along this corridor, Buddhism reached China in the 1st century CE, under the Han dynasty (Karyn Lai, An Introduction to Chinese Philosophy), with serious translation activity underway by the 2nd century. Its absorption into a civilisation with its own deep traditions — Confucian and Daoist — took centuries and reshaped it profoundly. In China, distinctively East Asian forms flourished, above all Chan (which would become Zen in Japan), with its emphasis on direct meditative insight, and Pure Land, centred on devotion to the Buddha Amitābha and rebirth in his “Pure Land.” (It was in this East Asian world that the jolly Laughing Buddha — the Chan monk Budai, later revered as Maitreya — emerged.)

From China, the East Asian transmission continued:

• to Korea, adopted by the kingdoms of the Three Kingdoms period (Goguryeo in 372 CE is the traditional first date);
• to Japan, traditionally introduced via Korea in the 6th century: the Nihon shoki dates the official introduction from the Korean kingdom of Paekche (Baekje) to 552 CE, while a biography of Prince Shōtoku and the records of the temple Gangōji give 538 (Satō Makoto, Encyclopedia of Shinto); there it took root and developed its own great schools;
• to Vietnam, which received both East Asian (Chan/Pure Land) and, in its south, Theravāda influences.

These weren’t simply copies of Indian Buddhism. Each culture remade the tradition in its own image — a recurring pattern across all of Buddhist history.

Buddhism in Myanmar and Thailand has pages of its own, as do two figures of the East Asian story: the pilgrim Xuanzang and Bodhidharma, the semi-legendary monk whom Chan tradition counts as its founder.

Vajrayana and the Spread to Tibet (from the 7th–8th c.)

A third great current developed in India in the later first millennium CE (by its end, in Lars Fogelin’s account, the monks of the great monasteries were “studying Tantric texts”): Vajrayāna, the “Diamond Vehicle,” also called tantric or esoteric Buddhism. Building on Mahayana philosophy, it added a rich repertoire of ritual, mantra, visualisation, and initiation transmitted from teacher to student.

Vajrayāna’s most consequential journey was to the Tibetan plateau. The standard account distinguishes two waves:

• The first diffusion, from the 7th–8th centuries. In the Tibetan account, King Songtsen Gampo (7th century) introduced Buddhism, and later King Trisong Detsen (8th century) invited Indian masters — including the scholar Śāntarakṣita and the tantric adept Padmasambhava, revered in Tibetan tradition as the figure who tamed the land for the Dharma — and founded Tibet’s first monastery, Samyé, where Śāntarakṣita ordained the first seven Tibetan monks.
• The second diffusion, from around the 10th–11th centuries, after a period of disruption. Tibetan translators and Indian teachers recovered and re-established the lineages, out of which Tibet’s main schools eventually crystallised.

The result is Tibetan Buddhism, a tradition that preserves a great deal of late Indian Mahayana and Vajrayāna learning that was later lost in India itself — and whose visual culture, from intricate mandalas to prayer flags strung across mountain passes, still carries that heritage into daily life. As we will see, that preservation would matter enormously in the modern era. Tibet’s later history, from the Indian master Atiśa to the Dalai Lamas and the 1959 exile, is told in Buddhism in Tibet, and its living lineages in the four schools of Tibetan Buddhism.

Decline in India (largely gone by the 12th–13th c.)

One of the strangest facts in this whole story is that Buddhism, born in India, had largely disappeared from the land of its birth by around the 12th–13th centuries. Why is a real and unresolved scholarly debate, and a trustworthy account should present it as such rather than pick a single villain. (We weigh the competing explanations in why Buddhism declined in India.)

Historians weigh a combination of factors:

• Patronage and land. In Lars Fogelin’s account, the early Sangha, before the early first millennium CE, “relied heavily on the patronage of kings, guilds, and ordinary Buddhists”; later the great monasteries became “powerful political and economic institutions with extensive landholdings and wealth,” and with their lands and wealth taken, he finds, most were abandoned in the 13th century.
• The resurgence of Hindu traditions. Devotional and philosophical movements within the broader Indian religious world grew vigorously. Giovanni Verardi reads the contest more sharply: in his book’s summary, Buddhism faced Brahmanical opposition from the start and “was gradually and often violently reduced to impotence.”
• Monasteries apart from the laity. Fogelin argues, from the archaeology, that their wealth let the monks “limit their day-to-day interaction with the laity,” and that this withdrawal “led to the collapse of Buddhism in India”: “Divorced from the day-to-day concerns of the Buddhist laity, Buddhist monasteries were particularly vulnerable” when the Turkic invasions came.
• The invasions of the 12th–13th centuries. Turkic armies struck the great monasteries of Bihar around 1200; the exact year is disputed. The main Persian account, by Minhaj-i Siraj, has Muhammad Bakhtiyar Khalji storm “the fortified city of Bihar,” where “the whole of that fortress and city was a college,” and it names no monastery (trans. H. G. Raverty). George Roerich, translator of the Tibetan pilgrim Dharmasvamin’s biography, put the sack of Vikramashila “about 1199 or 1200” and records that Odantapuri was “also destroyed.” When Dharmasvamin passed through in the 1230s, Vikramashila had been razed to the ground; Nālandā, in Roerich’s summary, was “largely deserted and damaged” but standing, its aged abbot still teaching.

What is not in dispute is the outcome: the unbroken monastic Buddhism of the Indian heartland came to an end, though Buddhism survived in the Himalayan world of Nepal and Tibet. The tradition lived on, vigorously, everywhere it had been transplanted; it simply went quiet at home for many centuries.

The Modern Era: Revival, Modernism, and the Global Turn

The last two centuries reopened the story in dramatic ways.

Colonial-era revival and “Buddhist modernism.” From the nineteenth century, encounters with European colonialism and scholarship — and with Christianity — prompted a wave of Buddhist self-renewal across Asia. In Sri Lanka, Anagārika Dharmapāla (1864–1933) founded the Maha Bodhi Society (1891) and campaigned to revive Buddhism, including in India; in 1893 he addressed the World’s Parliament of Religions in Chicago. Scholars call the broad result Buddhist modernism, which David McMahan defines as “forms of Buddhism that have emerged out of an engagement with the dominant cultural and intellectual forces of modernity.”

Buddhism returns to India. In a striking reversal, Buddhism took new root in its homeland on 14 October 1956, when the Indian jurist and Dalit leader B. R. Ambedkar publicly converted to Buddhism at Nagpur, and hundreds of thousands of his followers converted with him — a movement of social as well as religious significance that continues today.

The Tibetan diaspora. After the suppression of the 1959 uprising in Lhasa, the 14th Dalai Lama escaped into exile, and some 80,000 Tibetans, in the Central Tibetan Administration’s figure, sought refuge in India, Nepal and Bhutan. Tragic in its cause, the diaspora had an unintended consequence: it carried Tibetan Buddhism — and its remarkable storehouse of late Indian learning — to a global audience for the first time.

Transmission to the West. Through immigration from Asia, through returning travellers and teachers, and through the diasporas above, Buddhism became a living presence in Europe, the Americas, and Oceania during the twentieth century — as both a heritage tradition for Asian communities and a path adopted by converts. The modern movement known as engaged Buddhism, which applies Buddhist practice to social and political suffering, has a page of its own.

How many Buddhists today? Here, too, honesty requires care. By religious identity, the Pew Research Center estimated roughly 324 million Buddhists worldwide in 2020, down from about 343 million in 2010, which made Buddhists, Pew found, the only group in its study whose number fell. But Pew itself cautions that its estimates “do not reflect the full influence of Buddhism,” because in several East Asian places people practise Buddhism without considering themselves Buddhist in the formal sense, and the tradition is interwoven with local folk religion. In China, Pew found, about 4% of adults identify as Buddhist, while in a separate survey 33% say they believe in Buddha or a bodhisattva (a figure that includes many who also believe in other religious figures). Both kinds of number are defensible; they are simply measuring different things. We set out the estimates, the bodies behind them and the counting problems in how many Buddhists are there?

A Timeline of Buddhist History

Dates marked “traditional” or “c.” are approximate, and the earliest of them are disputed (see the relevant sections above). To see where each step happened, open the interactive map of Buddhism’s spread.

• 5th c. BCE — The Buddha lives and teaches in the Ganges plain (Theravāda tradition c. 624–544 BCE; older scholarship c. 560–480 BCE; many scholars now place his death c. 405 BCE). The first Sangha is formed.
• c. 5th–3rd c. BCE — Councils at Rājagṛha and Vesālī (traditional); the first schism into Sthaviravāda and Mahāsāṅghika; the early “schools” develop; in the Theravāda account, a third council at Pāṭaliputra under Ashoka.
• c. 270–232 BCE — Reign of Ashoka (dates disputed); missions carry Buddhism across and beyond India; Sri Lankan chronicles credit his son Mahinda with bringing it to Sri Lanka.
• 1st c. BCE — In Sri Lanka, by the Mahāvaṃsa’s account, monks write down the Pali Canon and its commentaries, until then handed down orally (the century is its translator Wilhelm Geiger’s dating of King Vaṭṭagāmaṇi’s reign).
• c. 1st c. BCE – 1st c. CE — Mahayana sutras begin to circulate (a Perfection of Wisdom manuscript is carbon-dated to 47–147 CE and was copied from an older one; origins debated).
• 1st–2nd c. CE — Buddhism spreads along the Silk Road; the Kushan empire and Gandhāra are key; Buddhism reaches China.
• c. 150–250 CE — Nāgārjuna systematises Madhyamaka philosophy.
• 4th–6th c. CE — Yogācāra develops; Buddhism reaches Korea (traditionally 372 CE, in Goguryeo) and then Japan (538 or 552 CE).
• 7th–8th c. CE — Vajrayāna’s first diffusion to Tibet (Songtsen Gampo; Trisong Detsen; Padmasambhava; Samyé).
• 10th–11th c. CE — Tibet’s second diffusion re-establishes the lineages.
• 12th–13th c. CE — Buddhism largely disappears from India (causes debated; Vikramashila and Odantapuri destroyed around 1200; Nālandā damaged and largely deserted by the 1230s).
• 12th–13th c. CE — In Japan, new schools take shape: the Pure Land movement of Hōnen (1133–1212) and Shinran (1173–1263), the Sōtō Zen founded by Dōgen, and Nichiren’s teaching of chanting the title of the Lotus Sutra.
• 19th–20th c. — Colonial-era revival and Buddhist modernism; Dharmapāla founds the Maha Bodhi Society (1891).
• 1893 — Buddhism is presented at the World’s Parliament of Religions in Chicago, in papers by Anagārika Dharmapāla of Ceylon and Shaku Sōen of Japan.
• 1956 — On 14 October, Ambedkar’s conversion at Nagpur, with hundreds of thousands of followers, brings Buddhism back to India.
• 1959 onward — The Tibetan diaspora carries Tibetan Buddhism worldwide.
• 20th–21st c. — Buddhism becomes a global religion; about 324 million people identified as Buddhist in 2020 (Pew).

Why Buddhism’s History Looks Like a River, Not a Line

Step back, and a pattern emerges. Buddhism has no single founder-after-the-founder, no central authority, and no single scripture binding on all Buddhists. Wherever it travelled, it was remade — by Sri Lankan chroniclers, Chinese translators, Tibetan yogis, Japanese Zen masters — while keeping a recognisable core: the Buddha, his teaching, and the community.

That is why an honest history resists the phrase “Buddhism says.” There are Buddhisms, plural, each the product of a particular journey through time and culture. The living results of these journeys are the great traditions we explore elsewhere — Theravāda, Mahayana and its Zen and Pure Land forms, and Tibetan Vajrayāna — gathered in our overview of the branches of Buddhism.

This history also left visible marks you can still walk to and take part in today. The places of the Buddha’s life became the four great pilgrimage sites; monasteries and shrines became the Buddhist temples of every Buddhist land, and monuments such as Java’s vast ninth-century Borobudur still stand as stone records of the tradition’s reach. The teaching is carried in a shared vocabulary of Buddhist symbols — among them the dharma wheel of his first sermon, the lotus of awakening, the eight auspicious symbols with their endless knot, and the ancient swastika of good fortune — and lived out in rites of passage like Buddhist funerals. And it is marked through the year in Buddhist festivals — most importantly Vesak, which remembers the Buddha’s birth, awakening, and passing together, alongside regional observances such as Japan’s Obon, the Theravāda holy days of Asalha Puja (which marks his first sermon) and Magha Puja, the Uposatha days that follow the phases of the moon, and Tibet’s Losar new year. Around them turns a whole ritual year: the monastic rains retreat (Vassa) with its closing Kathina robe-offering in the Theravāda lands, and in East Asia the separate observances of Bodhi Day, Parinirvana Day, and the Ullambana festival of the ancestral dead. It is lived, too, in daily devotion — prostration and offerings before the shrine, the mudrās that shape every Buddha image, and, in the Tibetan world, the seven offering bowls, the ritual vajra and bell, spinning prayer wheels, banks of butter lamps, and the white khata scarf. (In East Asia the same daily devotion is struck rather than spun — see why Buddhists ring bells.) (For how all of this has been put on film, from inside the traditions and from outside them, see our guide to Buddhist documentaries and films.)

For where the whole story begins — the man behind it all — start with who the Buddha was.