Brief Summary of Differences in Abhidharma Schools

Authored by Claude AI

A working reference on the major Abhidharma/Abhidhamma traditions:
their origin stories, doctrinal overlap, textual attribution, timeline, and relative textual survival.

Note on sourcing: Sections built from general background knowledge (not live-searched) are marked (background). Sections verified against web sources during this conversation are marked (verified) with inline citation numbers keyed to the References list at the bottom.

Table of Contents

• 1. The Seven Schools
• 1.1 Theravāda Abhidhamma
• 1.2 Sarvāstivāda Abhidharma
• 1.3 Vaibhāṣika
• 1.4 Sautrāntika
• 1.5 Pudgalavāda (Vātsīputrīya-Sāṃmitīya)
• 1.6 Dharmaguptaka
• 1.7 Mahāsāṅghika
• 2. Doctrinal Overlap Between Schools
• 2.1 Why This Comparison Differs from Nikāya/Āgama Overlap
• 2.2 The Shared Floor
• 2.3 Major Points of Divergence
• 2.4 Rough Estimate
• 3. Attribution by School
• 3.1 Theravāda
• 3.2 Sarvāstivāda
• 3.3 Vaibhāṣika
• 3.4 Sautrāntika
• 3.5 Pudgalavāda
• 3.6 Dharmaguptaka
• 3.7 Mahāsāṅghika
• 4. Is the Trāyastriṃśa/Māyā Origin Story Theravāda-Specific?
• 4.1 The Short Answer: No
• 4.2 Sarvāstivāda's Three Stacked Justifications
• 4.3 The Real Contrast
• 5. Timeline
• 6. Textual Survival by School
• 7. References

1. The Seven Schools

(background)

1.1 Theravāda Abhidhamma

Texts: Seven books — Dhammasaṅgaṇī, Vibhaṅga, Dhātukathā, Puggalapaññatti, Kathāvatthu, Yamaka, Paṭṭhāna.

Traditional origin story: The Buddha ascended to Tāvatiṃsa heaven during a rains retreat to teach the Abhidhamma to his deceased mother, Māyā,
and the assembled devas, then relayed a daily summary (the mātikā) to Sāriputta,
who elaborated it into the full system — later recited at the First Council.

Scholarly view: Regarded as post-canonical, systematized over centuries after the Buddha's death.
Exception:
the Kathāvatthu, whose core is attributed to Moggaliputta Tissa at the Third Council (~250 BCE),
refuting ~18 rival schools' positions.

1.2 Sarvāstivāda Abhidharma

Texts: The "six feet and one body" (ṣaṭpādābhidharma) —
Jñānaprasthāna as the central "body," plus six subsidiary texts, later crowned by the Mahāvibhāṣā.

Traditional/legendary origin: A council under Kushan king Kaniṣka in Kashmir/Gandhāra,
where 500 arhats compiled the Mahāvibhāṣā.

Scholarly view: The Kaniṣka council story is likely legendary or embellished,
but the school clearly developed in northwest India around the turn of the era.
Core doctrine:
sarvam asti ("everything exists" — past, present, future dharmas all real).

1.3 Vaibhāṣika

Not an independently founded school — the "orthodox" wing of Sarvāstivāda adhering to Mahāvibhāṣā positions.
Term used almost interchangeably with Sarvāstivāda in later doxography (e.g., Vasubandhu's Abhidharmakośa).

1.4 Sautrāntika

Origin: An internal critique of Sarvāstivāda,
associated with Kumāralāta and voiced through Vasubandhu's own auto-commentary on the Abhidharmakośa.

Character: "Those who rely on the sūtras" —
rejected Abhidharma categories (like real past/future dharmas) not grounded in the discourses.
No independent Abhidharma-piṭaka;
survives mainly as a polemical position embedded in Sarvāstivādin texts.

1.5 Pudgalavāda (Vātsīputrīya-Sāṃmitīya)

Texts: Tridharmaka Śāstra survives in Chinese;
otherwise known mostly through opponents' refutations (Vasubandhu's Kośa, Theravāda's Kathāvatthu Ch. 1).

Origin: Traced to elder Vātsīputra;
the Sāṃmitīya branch was the largest non-Mahāyāna school in India by Xuanzang's time (7th c.
CE).

Character: Posited the pudgala ("person") as neither identical to nor separate from the five aggregates —
explaining memory, moral responsibility, rebirth without a full ātman.
Target of sustained attack from nearly every other school.

1.6 Dharmaguptaka

Texts: Own Abhidharma largely lost in the original;
the Śāripūtra-abhidharma-śāstra (surviving in Chinese) is sometimes associated with this school,
though sectarian affiliation is debated.

Origin: Traced to elder Dharmagupta, an offshoot of Mahīśāsaka;
historically important as the source of the Vinaya lineage still standard in East Asia.

1.7 Mahāsāṅghika

Origin: Emerged from the first major schism (traditionally ~100 years after the Buddha) —
over the "five points" of Mahādeva in one account, or Vinaya laxity among Vṛjiputraka monks in another.

Abhidharma: Reportedly had an Abhidharma-piṭaka, almost none surviving independently.
Related material possibly embedded in the Mahāvastu (Lokottaravāda-Mahāsāṅghika) and later Yogācāra literature drawing on Mahāsāṅghika "supramundane" (lokottara) Buddha concepts.

2. Doctrinal Overlap Between Schools

(background)

2.1 Why This Comparison Differs from Nikāya/Āgama Overlap

The Nikāya/Āgama parallel (~95% agreement) is a transmission-fidelity question:
did separate communities preserve the same received pre-schism material faithfully?
Abhidharma is post-schism constructive scholarship — built independently by each nikāya after the splits.
Low overlap here isn't transmission failure;
it's expected, the way independent philosophy departments don't converge on shared metaphysics just from a shared starting point (Aristotle,
here read as the suttas).

2.2 The Shared Floor

• Inherited sutta categories: khandha (5), āyatana (12), dhātu (18), 22 indriyas — every system starts from this furniture.
• The basic project: decomposing experience into discrete, irreducible dhammas/dharmas vs. conventional (paññatti) designations. Pudgalavāda is the deliberate partial outlier.
• The mātikā method: organizing dharmas into analytical matrices.

2.3 Major Points of Divergence

• Metaphysics of time: Sarvāstivāda's sarvam asti vs. Theravāda presentism vs. Sautrāntika's more radical momentariness.
• Enumeration: Theravāda 82 dhammas vs. Vasubandhu's Sarvāstivāda/Vaibhāṣika count of 75 dharmas in 5 categories vs. later Yogācāra's 100 — different carvings of the space, not relabeled overlaps.
• Causation systems: Theravāda's 24-condition Paṭṭhāna vs. Sarvāstivāda's 6-hetu/4-pratyaya system — independently invented architectures.
• The unconditioned (asaṃskṛta): Theravāda has one (nibbāna); Sarvāstivāda has three (two cessations + space).
• Consciousness taxonomy: Theravāda's 89/121-citta system is largely sui generis vs. Sarvāstivāda's different citta/caitta organization.
• Pudgalavāda's pudgala: rejected by every other school — the genuine outlier.
• The Kathāvatthu itself: a monument to disagreement, refuting 200+ contested positions across ~18 rival schools.

2.4 Rough Estimate

Shared floor (method + inherited categories) is closer to shared grammar than shared content —
generously ~20–30% if "method" counts as overlap.
Actual systematized content (enumerations, causal theories, time/existence metaphysics) diverges well beyond that.
Percent-agreement framing itself starts to break down here,
analogous to asking how much Kantian and Humean epistemology "agree."

3. Attribution by School

(background)

3.1 Theravāda

No single human author — attributed to the Buddha, systematized by Sāriputta.
Exception:
Kathāvatthu → Moggaliputta Tissa (Third Council, ~250 BCE).
Commentarial layer:
Buddhaghosa (5th c.
CE, Atthasālinī), Anuruddha (Abhidhammatthasaṅgaha, date disputed ~8th–12th c.).

3.2 Sarvāstivāda

• Jñānaprasthāna → Kātyāyanīputra
• Saṅgītiparyāya → Śāriputra or Mahākauṣṭhila (sources disagree)
• Dharmaskandha → Śāriputra or Maudgalyāyana (disputed)
• Prajñaptiśāstra → Maudgalyāyana
• Dhātukāya → Pūrṇa or Vasumitra
• Vijñānakāya → Devaśarman
• Prakaraṇapāda → Vasumitra
• Mahāvibhāṣā → collective product of 500 arhats at the legendary Kaniṣka council; Vasumitra traditionally named as presiding.

3.3 Vaibhāṣika

No independent authorship — designates adherents of Mahāvibhāṣā positions;
attribution question collapses into Sarvāstivāda above.

3.4 Sautrāntika

No independent Abhidharma-piṭaka.
Views known mainly through Vasubandhu's Abhidharmakośa-bhāṣya (auto-commentary arguing from a Sautrāntika-leaning stance). Kumāralāta and Śrīlāta named in later doxography as earlier teachers,
little survives directly under their names.

3.5 Pudgalavāda

Traced to elder Vātsīputra. Tridharmaka Śāstra (Chinese) associated with the school lineage rather than one named composer.

3.6 Dharmaguptaka

Śāripūtra-abhidharma-śāstra attributed by title to Śāriputra,
though actual sectarian origin is debated by scholars.
No other well-attested individual author.

3.7 Mahāsāṅghika

No individual author attested (Abhidharma-piṭaka mostly lost). Mahāvastu (related material) is composite,
no single author, grew over centuries within the Lokottaravāda sub-branch.

General pattern: attribution record thins the further one gets from the two best-preserved systems (Theravāda, Sarvāstivāda);
school-lineage attribution was often more important to preserve than individual authorship.

4. Is the Trāyastriṃśa/Māyā Origin Story Theravāda-Specific?

(verified — see References)

4.1 The Short Answer: No

The Trāyastriṃśa-visit-to-teach-Māyā narrative is pan-Buddhist, not sect-specific — one of the Eight Great Events,
still marked today across Tibetan, Theravāda Southeast Asian, and East Asian calendars as Lhabab Düchen [2][5][7].
The core story — Buddha teaching in the Heaven of the Thirty-Three during a rains retreat,
in the seventh year after enlightenment, following the Śrāvastī miracles, returning via a triple staircase at Sāṃkāśya —
appears independent of Theravāda-specific transmission,
including in Avadānaśataka-linked sources [3] and Sarvāstivāda-adjacent cosmological material in the Dharmaskandha [8].

4.2 Sarvāstivāda's Three Stacked Justifications

Per the Abhidharmakośa's own introduction, Vasubandhu records multiple competing explanations,
held simultaneously,
for why the seven Sarvāstivāda texts count as buddhavacana despite having named human compilers [4]:

1. Named-author explanation — the texts were literally composed by Kātyāyanīputra, Śāriputra, Maudgalyāyana, etc.
2. Ārya direct-transmission explanation — the compilers were āryas with direct access to the Buddha's realization, making it his word by a different route than ordinary authorship.
3. Trāyastriṃśa/Sāriputta explanation — structurally identical to the "Theravāda" story: Buddha taught the Abhidharma in the deva realm, then repeated its contents to Śāriputra on earth, who remembered it [4].

4.3 The Real Contrast

Not presence-vs-absence of the heavenly myth.
Theravāda committed to one canonical version as orthodoxy;
Sarvāstivāda preserved multiple competing legitimation stories side by side without resolving which was "true."
This reflects differing institutional attitudes toward whether a tradition needs one settled origin myth or can tolerate live disagreement about its own textual authority.

Open question (unverified in this conversation): whether Dharmaguptaka, Pudgalavāda,
or Mahāsāṅghika had their own version of this specific legitimation story —
material here is thinner and would need further search.

5. Timeline

(background — approximate/traditional dates, contested in scholarship;
BCE/CE)

6. Textual Survival by School

(background — rough qualitative estimate, not a documented metric;
treat as illustrative rather than precise)

"Completeness" here means:
how much of that school's own core Abhidharma corpus survives today, in any language,
versus being lost or known only secondhand through rivals' refutations.

Reading the chart: survival correlates strongly with which lineages had ongoing living monastic transmission into the modern era (Theravāda in Sri Lanka/SE Asia,
Sarvāstivāda-derived material via the Chinese canon) versus schools that lost their institutional base in India before their texts were translated elsewhere (Pudgalavāda,
Mahāsāṅghika) — textual survival tracks institutional survival,
not doctrinal importance or historical size (recall Pudgalavāda/Sāṃmitīya was likely the largest school by the 7th century,
yet has the thinnest surviving textual record).

References

Sources retrieved via web search for Section 4:

1. Trāyastriṃśa, Encyclopedia of Buddhism — https://encyclopediaofbuddhism.org/wiki/Tr%C4%81yastri%E1%B9%83%C5%9Ba
2. "Lhabab Düchen: The Buddha's Descent from the Trayastrimsa Heaven," Medium (Acala Vidyaraja) — https://medium.com/acala-vidyaraja-publishing/lhabab-d%C3%BCchen-the-buddhas-descent-from-the-trayastrimsa-heaven-a9bb2d2d110f
3. "Buddha's sermon to the Trāyastriṃśa gods," Appendix 3, Mahāprajñāpāramitāśāstra — https://www.wisdomlib.org/buddhism/book/maha-prajnaparamita-sastra/d/doc225866.html
4. "Sarvastivada Abhidharma and Theravada Abhidharma," Dharma Wheel forum — https://www.dharmawheel.net/viewtopic.php?t=19345
5. "The power of a woman's devotion... (Lhabab Duchen)," Dakini Translations — https://dakinitranslations.com/2020/11/07/a-womans-devotion-the-woman-first-to-greet-buddhas-descent-from-the-heavens-lhabab-duchen/
6. Section A, Xuanfa Institute glossary — https://xuanfa.net/glossary/a/
7. "Samkashya," Nekhor — https://www.nekhor.org/buddha/samkashya
8. Trāyastriṃśa, Grokipedia — https://grokipedia.com/page/Tr%C4%81yastri%E1%B9%83%C5%9Ba
9. Sarvāstivāda / Śrāvakayāna concept entries, EPFL Graph Search — https://graphsearch.epfl.ch/en/concept/8601496/concepts?page=2

Note: Sections 1–3 reflect general scholarly background on Abhidharma literature (Buswell & Lopez,
Princeton Dictionary of Buddhism;
Frauwallner;
Cox;
Anālayo's comparative Nikāya/Āgama work) rather than sources searched live in this conversation.
Given lucid24.org's scholarly standards,
these should be cross-checked against primary secondary literature before publication.