Bundahishn

The Bundahishn ("Primal Creation") is the great Zoroastrian cosmological text, not part of the Avesta itself but a compilation in Middle Persian (Pahlavi), assembled in its fullest form in the ninth century CE, after the Islamic conquest of Iran, yet drawing on far older Avestan material now partly lost. It sets out the Zoroastrian account of the cosmos from beginning to end: the two primal spirits, the wholly good Ohrmazd (Ahura Mazda) and the destructive Ahriman, and the great cosmic drama in which Ahriman assaults the good creation, is trapped within the material world he has invaded, and is at last defeated; the making of the sky, water, earth, plants, the primal ox and the first man; and the final events, resurrection of the dead, the last judgement, and the frashokereti, the renovation in which the world is made perfect and evil is undone forever. As the most systematic surviving statement of Zoroastrian cosmic dualism and eschatology, the Bundahishn is indispensable for understanding how the tradition imagined the origin, purpose and end of the world.

The Bundahishn survives in two distinct forms, long known to scholars as the Greater or Iranian Bundahishn and the shorter Indian Bundahishn, and the difference between them reflects what each community preserved rather than a simple case of one copying the other badly. The Greater Bundahishn, transmitted through Zoroastrian communities that remained in Iran after the Islamic conquest, is substantially longer and includes material the Indian version lacks, including a chronicle of legendary and historical Iranian kings appended to the cosmological account, connecting the text's picture of cosmic history to the more human history of the dynasties Zoroastrians understood themselves to have descended from.

The Indian Bundahishn, preserved among the Parsi community whose ancestors emigrated to the subcontinent centuries earlier, is shorter and omits this royal chronicle, suggesting the two communities either had access to different underlying material or made different choices about what to keep as their manuscript traditions diverged after separation. Reconstructing what the earliest Bundahishn actually contained means reading the two families against each other, and neither can be treated as simply the complete text with the other an abridgment; each preserves things the other does not, and the differences between them are themselves a record of how a shared scripture kept diverging once its communities of transmission split geographically.