What is Sarvāstivāda?
The Sarvāstivāda was the dominant Buddhist school of north India from roughly the second century BCE to the seventh century CE. It was based in Kashmir and Gandhāra. Its defining claim is that the dharmas (the momentary building-blocks into which the Abhidharma analysis resolved all experience) exist in all three times: past, present, and future alike. The name means the doctrine that all dharmas exist. The thesis is a metaphysical answer to a problem internal to dependent origination: if a present moment is conditioned by a past moment, that past moment must in some sense still exist to do the conditioning.
Sarvāstivāda versus Theravāda and Sautrāntika
The Sarvāstivāda is not the Theravāda. Both schools share the Abhidharma analytical method and treat the Buddha's close disciples as the systematisers of the canonical lists. But the texts differ: the Theravāda works in seven Pāli Abhidhamma books that are separate from the Sarvāstivāda's. More importantly, the Theravāda does not assert that past and future dharmas are real entities. The Sarvāstivāda did not survive as a living school. Its inheritance is textual: the Chinese translations of its canon brought back from India in the seventh century by Xuanzang and others, and the technical vocabulary every later Indian and East Asian Buddhist system still uses.
The Sautrāntika school occupied a middle position. It accepted the Sarvāstivāda's analytical framework but rejected the three-time thesis: past and future dharmas, for the Sautrāntikas, are not real entities but names for what has ceased or has not yet arisen. Vasubandhu presented the Sarvāstivāda system in verse in his Abhidharmakośa and then, in his own prose commentary, defended the Sautrāntika alternative. The tension is built into the text.
Why the school mattered
The Sarvāstivāda produced the most ambitious systematisation of Buddhist doctrine the early tradition ever attempted. Its great project was the Mahāvibhāṣā (the Great Exegesis), compiled around the second century CE under the Kuṣāṇa king Kaniṣka. The Mahāvibhāṣā catalogued seventy-five dharmas, sorted them into the conditioned and the unconditioned, and worked out a theory of causation in which six causes and four conditions operated across all three times. Vasubandhu's later Abhidharmakośa (fourth or fifth century) distilled this system into the compact form that East Asian Buddhist scholasticism studied for centuries. *The Essentials of Buddhist Philosophy* by Junjirō Takakusu, a mid-twentieth-century English survey, organises its chapters around this system and treats the Sarvāstivāda analysis as the technical baseline on which every later Indian Buddhist system was built. The Sarvāstivāda literature is where Buddhist philosophy first became a fully discursive, systematic, argumentatively articulated discipline.
How the Mahāyāna defined itself against it
The early Mahāyāna inherited the Sarvāstivāda's vocabulary and rejected its central thesis. Nāgārjuna's Mūlamadhyamakakārikā, the second-century foundational text of Madhyamaka, argues that no dharma, past, present, or future, has *svabhāva* (inherent nature). The entire Sarvāstivāda edifice of three-time realism collapses on that prior question. *The Awakening of Faith in the Mahāyāna*, a text whose Indian or Chinese provenance remains contested, moves further still. It reframes the world of conditioned phenomena not as a real plurality of dharmas but as the surface of a single underlying tathatā (suchness).
Where to encounter it in the index
No primary Sarvāstivāda text is a row in the index. The school's presence is best traced through volumes that take its analyses as their starting point. Takakusu's *The Essentials of Buddhist Philosophy* is the most direct: a chapter-by-chapter survey of the major Indian Abhidharma and Mahāyāna systems, written for English-language students without Sanskrit. *The Awakening of Faith in the Mahāyāna* is the Mahāyāna counter-text, historically read as the moment the East Asian Buddhist tradition stepped outside the Indian scholastic frame the Sarvāstivāda had built. Thich Nhat Hanh's teaching on emptiness, signlessness and aimlessness and his longer-form teaching on true Buddhist teachings carry the Mahāyāna response into contemporary practice; the Sarvāstivāda is the unspoken interlocutor the vocabulary of emptiness and svabhāva arose in dialogue with. Joseph Goldstein's *Mindfulness* and the Goldstein–Salzberg Insight Meditation course carry the Theravāda parallel: a different Abhidhamma, the same family argument about how to inventory experience without producing the kind of metaphysical entities the Buddha refused.
