Schools of Buddhism — Theravada, Mahayana, Vajrayana.

The Buddhism that exists today is not one thing but three distinct streams — Theravada in Sri Lanka and Southeast Asia, Mahayana in East Asia, and Vajrayana in Tibet and the Himalayan world. All three trace themselves to the same historical Buddha and the same first sermon at Sarnath, but they differ profoundly in what they believe the goal of Buddhist practice to be, in what they say the Buddha actually was, in the texts they revere, and in the methods they use for liberation. Understanding how the tradition divided — and what each school stands for — is essential for UPSC questions that ask about the bodhisattva ideal, the councils, the geographic distribution of Buddhist schools, and the meaning of terms like Hinayana, Theravada, Mahayana, and Vajrayana.

How the schools arose: unity to division

The Buddha left no written teachings. His discourses were memorised and orally transmitted by his monks. Almost immediately after his death, the question arose: what exactly had he said, and what rules had he laid down for the monastic community? The First Buddhist Council, held at Rajgir (Rajagriha, Bihar) shortly after the Buddha's death — traditionally c. 483 BCE — was convened to settle these questions. Under the patronage of King Ajatashatru of Magadha, the Venerable Mahakassapa presided. The monk Upali recited the monastic rules (Vinaya) and the monk Ananda recited the discourses (Dhamma). The council compiled and ratified these recitations. For full details on all four councils, see the Buddhist Councils article.

The first major schism occurred at the Second Council, held at Vaishali approximately a century later (c. 383 BCE). A group of monks from the Vajji region proposed ten relaxations of the monastic rules — including accepting gold and silver and eating at irregular hours. Senior monks (the Sthaviravadins, or Elders) declared these relaxations illegal. The reforming group — the Mahasanghikas (Great Assembly) — refused to accept this judgment and held a separate council. This split is the foundational fork in the road of Buddhist history: the Sthaviravadins are the precursors of Theravada; the Mahasanghikas are considered the precursors of the Mahayana movement.

The subsequent centuries saw further subdivisions within both camps. By the time of the Third Council (Pataliputra, c. 250 BCE, under Ashoka), eighteen schools were counted. Mahayana as a distinct, self-conscious tradition is usually dated to approximately the first and second centuries CE, when the great Prajnaparamita sutras (Perfection of Wisdom texts) began to circulate and the bodhisattva ideal was formulated explicitly.

Theravada: Way of the Elders

Theravada (Pali: Thera-vada — Way of the Elders) is the oldest surviving school of Buddhism and the only one of the original eighteen Nikaya schools that has survived into the present. It traces its lineage back to the Sthaviravadins of the Second Council and is now the dominant form of Buddhism in Sri Lanka, Myanmar, Thailand, Laos, and Cambodia.

The Pali Tipitaka — the Three Baskets — is the canonical text of Theravada. The Vinaya Pitaka contains the rules of monastic discipline. The Sutta Pitaka contains the Buddha's discourses. The Abhidhamma Pitaka contains philosophical analysis. This text was written down for the first time in Sri Lanka around the first century BCE, during the reign of King Vattagamani Abhaya, because the monks feared that oral transmission was becoming unreliable during a period of famine and political instability. The writing-down of the Pali Canon is sometimes counted as the Fourth Buddhist Council in the Theravada tradition.

The ideal practitioner in Theravada is the arahant — one who has eliminated all defilements, achieved full liberation, and will not be reborn after death. The arahant is the goal of the monastic path. Lay followers support the monks and accumulate merit through generosity, which creates the conditions for a better rebirth and eventually for taking up the monastic path themselves in some future life.

Mahayana: the Greater Vehicle

Mahayana (Sanskrit: Maha-yana — Great Vehicle) emerged as a distinct self-identifying tradition around the first and second centuries CE, though its roots go back to the Mahasanghikas and perhaps even earlier tendencies within the tradition. The name is polemical: "Great Vehicle" implies that the older schools are a "Lesser Vehicle" — the term Hinayana (Hina-yana) was coined by Mahayana Buddhists as a pejorative for the earlier schools. Theravada Buddhists reject the label.

Mahayana criticised the Theravada ideal of the arahant as selfish — a person who achieves their own liberation and "gets out" of the cycle of rebirth, leaving all other beings behind. The Mahayana ideal demands something more heroic: the bodhisattva who chooses to stay, lifetime after lifetime, until every being is liberated. This shift is not just philosophical — it has enormous implications for Buddhist art, devotion, and practice. Mahayana temples are filled with images of bodhisattvas who can be called upon for compassion and assistance; the most famous is Avalokiteshvara (Guanyin in China, Kannon in Japan), the bodhisattva of compassion.

The bodhisattva ideal: the defining difference

The bodhisattva ideal is the philosophical heart of Mahayana and the clearest single point of differentiation from Theravada. A bodhisattva is a being who has cultivated the aspiration to Buddhahood not for personal liberation but for the liberation of all sentient beings. The bodhisattva takes the bodhicitta vow — the vow to achieve full enlightenment for the benefit of all beings — and embarks on a path across countless lifetimes of perfecting wisdom and compassion.

In Theravada, the term "bodhisattva" exists but is used in a much more limited sense: it refers only to the historical Gautama Buddha in his previous lives (as described in the Jataka stories), before he achieved full Buddhahood. The universal application of the bodhisattva ideal to all practitioners — the idea that every person can and should aspire to Buddhahood for all beings — is uniquely Mahayana.

The two great Mahayana philosophical schools are worth noting for the UPSC. Madhyamaka (Middle Way philosophy), founded by Nagarjuna (c. 2nd century CE), holds that all phenomena are empty of inherent existence (sunyata) — they exist only in dependent relationship to other phenomena. Yogacara (also called Vijnanavada or "Mind-Only"), developed by Asanga and Vasubandhu (c. 4th–5th century CE), holds that external reality is a projection of consciousness. Both Nagarjuna and the Asanga-Vasubandhu brothers were associated with Nalanda university in Bihar. The underlying philosophical framework all three schools share and interpret — the Four Noble Truths and the Eightfold Path — is examined in the preceding article in this series.

Vajrayana: the Diamond Vehicle

Vajrayana (Sanskrit: Vajra-yana — Diamond or Thunderbolt Vehicle) developed in India approximately from the 6th–7th century CE and represents a third major development within the Buddhist tradition. It is sometimes classified as a form of Mahayana — it accepts the bodhisattva ideal and Mahayana philosophy — but is distinct in its methods.

For UPSC, the key facts about Vajrayana: it emerged in India in the 6th–7th century CE; its major Indian centres were Nalanda and Vikramasila (both in Bihar); it spread to Tibet (where it became Tibetan Buddhism), Nepal, and Bhutan; it declined in India when the Turkish invaders under Bakhtiyar Khilji destroyed the great universities. The burning of Nalanda in 1193 CE is often cited as a watershed moment in the decline of Buddhism in India.

Key texts across the three schools

Buddhist literature is enormous, but a handful of texts appear in UPSC questions. The Pali Tipitaka is the canonical text of Theravada — three baskets (Vinaya, Sutta, Abhidhamma Pitaka), compiled in Pali, written down in Sri Lanka in the 1st century BCE. The Dipavamsa and Mahavamsa are Sri Lankan Pali chronicles important for Buddhist chronology and history.

Mahayana texts include the Prajnaparamita sutras (Perfection of Wisdom — including the Heart Sutra and Diamond Sutra), the Lotus Sutra (Saddharmapundarika), and the Vimalakirti Sutra. These circulate in Sanskrit and in Chinese and Tibetan translations. The Chinese Buddhist pilgrim Fa Xian (visited India c. 399–412 CE) and Xuan Zang (visited c. 629–645 CE) came to India specifically to collect Buddhist texts. Xuan Zang studied at Nalanda for years and his account (Si-Yu-Ki) is a crucial historical source for 7th-century India. Both pilgrims are tested by UPSC in the context of Indian history and sources.

Geographic spread: where did each school go?

The geographic distribution of Buddhist schools is a standard UPSC matching question. The spread began under Ashoka (c. 250 BCE), who sent missionaries to multiple regions. His son Mahinda carried Theravada to Sri Lanka; his daughter Sanghamitta brought a cutting of the Bodhi tree — the original pipal at Bodh Gaya under which the Buddha attained enlightenment (full biographical context in the Origin of Buddhism article).

The broad geographic picture to hold: Theravada = Southern Buddhism (Sri Lanka, Myanmar, Thailand, Laos, Cambodia). Mahayana = Northern/Eastern Buddhism (China, Japan, Korea, Vietnam). Vajrayana = Himalayan/Central Asian Buddhism (Tibet, Bhutan, Mongolia, Nepal). Buddhism spread to Central Asia along the Silk Road (Gandhara, Bactria), to Southeast Asia by sea routes, and to East Asia through Central Asia and the Silk Road.

Buddhism declined in India itself from the 8th century onward for multiple reasons: the reform of Brahmanical Hinduism under Adi Shankaracharya, the rise of bhakti movements, the absorption of the Buddha into the Hindu pantheon as an avatar of Vishnu (which helped blur the distinction), and most decisively the Turkish invasions of the 12th century which destroyed the great monastic universities — Nalanda, Vikramasila, Odantapuri — that had been the institutional backbone of Buddhism in India. By the 13th century, Buddhism had essentially ceased to exist as a living tradition in most of India.

UPSC comparison: what the exam tests

The exam tests this topic in three recurring ways. First, matching questions: match Theravada/Mahayana/Vajrayana to their characteristics, geographic spread, texts, or goals. The table below captures the key contrasts. Second, statement questions: test whether individual claims about a specific school are correct (e.g. "Theravada uses Sanskrit texts" — false; it uses Pali). Third, term-identification: what is a bodhisattva, what is an arahant, what does Hinayana mean and which school does it describe.

The Chinese pilgrims — Fa Xian and Xuan Zang — are perennial UPSC subjects. Fa Xian is associated with the Gupta period (early 5th century CE); Xuan Zang with Harsha's reign (7th century CE) and Nalanda. Xuan Zang's account specifically mentions the universities, the king's patronage, and the dominance of Buddhism in certain regions, making him a primary historical source that UPSC has used repeatedly in questions about the sources for ancient Indian history. For a comparative treatment of the Jain tradition — which arose in the same Gangetic world and whose contrasts with Buddhism are a favourite UPSC pairing — see Vardhamana Mahavira and Core Teachings of Jainism.