Sects and the Spread of Buddhism

After the Buddha's parinirvana, the Buddhist community held a series of councils to consolidate his teaching, establish monastic discipline, and adjudicate doctrinal differences. Over the centuries, three major traditions emerged, each with distinctive emphases. This lesson covers the three traditions, their geographic spread, and the contemporary forms of Buddhism.

The Buddhist councils

Four early councils shaped the post-Buddha tradition:

Council	Date	Location	Significance
First	c. 483 BCE	Rajagriha	Compilation of the Vinaya and Sutta Pitakas
Second	c. 383 BCE	Vaishali	Disputes over monastic discipline; first major schism
Third	c. 250 BCE	Pataliputra	Held under Emperor Ashoka; consolidation of Theravada canon; missionary expansion
Fourth	c. 1st century CE	Kashmir (Sarvastivada) / Sri Lanka (Theravada)	Different traditions held different fourth councils

By the 1st century CE, the broad division between Theravada ("the way of the elders") and the emerging Mahayana ("the great vehicle") was visible.

Theravada Buddhism

Theravada is the older of the two principal traditions, sometimes called the "Southern" tradition because of its geographic concentration in South and Southeast Asia.

Distinctive features

Geographic distribution

Theravada is dominant in:

• Sri Lanka — where the tradition was established in the 3rd century BCE under Emperor Ashoka's missionary efforts; the Pali Canon was written down here.
• Myanmar (Burma) — Theravada has been the dominant tradition since the 11th century.
• Thailand — Theravada has been the state religion for centuries.
• Cambodia and Laos — Theravada displaced earlier Mahayana presence by the 14th century.

Major sub-schools

The principal Theravada monastic lineages include the Mahavihara (the dominant Sri Lankan tradition), the Mahanikaya and Dhammayuttika (in Thailand), and various forest-meditation traditions (notably the Thai Forest Tradition associated with Ajahn Mun and Ajahn Chah).

Mahayana Buddhism

Mahayana ("the Great Vehicle") emerged around the 1st century CE and is the larger of the two traditions today by adherent count.

Distinctive features

Geographic distribution

Mahayana is dominant in:

• China — where Buddhism arrived from the 1st century CE and developed distinctive Chinese forms.
• Japan — where Buddhism arrived in the 6th century CE and evolved into multiple distinctive schools.
• Korea — both north and south, though now more strongly in the south.
• Vietnam — where Mahayana coexists with Theravada and Confucian traditions.
• Mongolia — historically.

Major Mahayana schools

Several schools developed within Mahayana, particularly in East Asia:

• Madhyamaka — founded by Nagarjuna; emphasises emptiness (sunyata).
• Yogacara — founded by Asanga and Vasubandhu; emphasises consciousness as the basis of experience.
• Tiantai (China) / Tendai (Japan) — synthesised Mahayana doctrine around the Lotus Sutra.
• Huayan (China) / Kegon (Japan) — based on the Avatamsaka Sutra.
• Pure Land (Jingtu / Jodo / Jodo Shinshu) — devotion to Amitabha Buddha and aspiration for rebirth in his Pure Land.
• Chan (China) / Zen (Japan) / Seon (Korea) / Thien (Vietnam) — meditation-focused tradition emphasising direct insight beyond doctrine.
• Nichiren (Japan) — focused exclusively on the Lotus Sutra and the chant Nam Myoho Renge Kyo.

Vajrayana Buddhism

Vajrayana ("the Diamond Vehicle" or "Tantric Vehicle") emerged from the 6th century CE onwards within the broader Mahayana tradition. It is sometimes treated as a third major vehicle, sometimes as a sub-form of Mahayana.

Distinctive features

Geographic distribution

Vajrayana is dominant in:

• Tibet and the Himalayan regions — where Vajrayana arrived from India in the 7th-8th centuries CE and became the dominant Buddhist tradition.
• Mongolia — Vajrayana spread northward from Tibet in the 16th century.
• Bhutan — where Vajrayana is the state religion.
• Parts of Russia (Buryatia, Kalmykia, Tuva).
• Japan — Shingon Buddhism is a Vajrayana tradition; Tendai also incorporates Vajrayana elements.

The major Tibetan schools

Tibetan Buddhism is organised into four main schools:

• Nyingma — the oldest, tracing to Padmasambhava (8th century).
• Kagyu — emerged 11th century; subdivisions include Karma Kagyu (with the Karmapa lineage).
• Sakya — emerged 11th century; politically significant in 13th-14th century Tibet.
• Gelug — emerged 14th-15th century, founded by Tsongkhapa; the Dalai Lama lineage and Panchen Lama lineage are within this school.

The geographic spread of Buddhism

The geographic spread followed broadly two routes:

The southern transmission

From India to Sri Lanka under Ashoka's son Mahinda (3rd century BCE), then onward to Southeast Asia. This transmission carried the Theravada tradition.

The northern transmission

From India through Central Asia and along the Silk Road to China (1st century CE), then onward to Korea (4th century), Japan (6th century), Vietnam (1st-2nd century) and eventually Mongolia. This transmission initially carried various Mahayana traditions; later transmissions from India to Tibet (7th-8th centuries) carried Vajrayana.

Buddhism in India

Notably, Buddhism declined in its land of origin. Three factors contributed:

• Hindu reabsorption — the philosophical and devotional reforms of Hinduism (the Bhakti movement) absorbed much of what had been distinctively Buddhist appeal.
• Muslim invasions — the destruction of major monastic universities (Nalanda, Vikramashila) in the 12th-13th centuries was a serious blow.
• Loss of monastic institutional base — without monastic universities, transmission of complex Buddhist learning collapsed.

By the 14th century, Buddhism had largely disappeared from mainland India. It survived in pockets — the Buddhist communities of Ladakh, Sikkim and the Northeast — but was a minority tradition.

The 20th-century revival

Two 20th-century developments restored Buddhism's Indian presence:

The Ambedkarite conversion movement

B.R. Ambedkar, the Dalit leader and architect of the Indian Constitution, formally converted to Buddhism in 1956 with hundreds of thousands of followers, in protest against caste exclusion within Hinduism. This produced the Navayana ("New Vehicle") tradition — a modern, social-justice oriented Buddhism.

The Tibetan diaspora

The 1959 Chinese suppression in Tibet produced the migration of the 14th Dalai Lama and large numbers of Tibetan Buddhist monks and laypeople into India, where they have established monasteries (notably at Dharamshala) and contributed to a Tibetan Buddhist presence in India and globally.

Contemporary Buddhism

Three trends define contemporary Buddhism:

1. Engaged Buddhism

Pioneered by figures like the Vietnamese teacher Thich Nhat Hanh and the Sri Lankan A.T. Ariyaratne, "engaged Buddhism" emphasises social action, peace work, and community development as expressions of Buddhist practice.

2. Western Buddhism

Buddhism has spread to Western Europe and North America since the 19th century, becoming a significant minority tradition in some regions. Western Buddhism includes traditional Asian-origin lineages (Tibetan, Zen, Theravada) and Western adaptations (mindfulness movements partly drawn from Buddhist practice).

3. The mindfulness diffusion

The mindfulness practice — drawn principally from Theravada vipassana meditation but secularised and packaged for mental-health and stress-reduction applications — has become a global wellness phenomenon, often largely separated from explicit Buddhist context.

What CSS questions on this topic typically demand

Three exam shapes:

1. Sectarian — "Discuss the major sects of Buddhism — Theravada, Mahayana and Vajrayana."
2. Geographic — "Trace the spread of Buddhism across Asia."
3. Contemporary — "How has Buddhism evolved in the modern period?"

A strong answer combines accurate doctrinal description with attention to geographic specificity and engagement with contemporary forms.

What you take from this topic

Buddhism is internally divided into three major traditions — Theravada, Mahayana, Vajrayana — each with distinctive scriptures, doctrinal emphases and geographic presence. The next topic — Judaism — turns from the dharmic traditions of South Asia to the first of the three Abrahamic religions.