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Zarathustra

Zarathustra, also known in Western languages as Zoroaster, is the ancient Iranian religious reformer traditionally regarded as the founder of Zoroastrianism.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Zarathustra, also known in Western languages as Zoroaster, is the ancient Iranian religious reformer traditionally regarded as the founder of Zoroastrianism. His exact dates are uncertain, but scholars generally place him in the second or early first millennium BCE. He is associated with the worship of Ahura Mazda and with teachings often described as ethical dualism.

Identity and historical setting

Zarathustra is the ancient Iranian religious figure known in Greek and Latin tradition as Zoroaster. Accounts place him in eastern or northeastern Iran, but the chronology of his life remains uncertain.

Religious teachings

He is credited with promoting devotion to Ahura Mazda and a moral opposition between truth and falsehood or good and evil. These teachings became foundational for Zoroastrianism.

Textual tradition

The oldest Zoroastrian scriptures, especially the Gathas, are traditionally associated with Zarathustra. These texts are central to understanding his religious message, though authorship and dating are debated.

Later influence

Zarathustra became a major figure in later religious and philosophical history, and his name was widely used in Western literature and thought. He is also the title figure in Nietzsche's philosophical work *Thus Spoke Zarathustra*.

Key facts

  • Zarathustra is the Avestan name of the figure better known in the West as Zoroaster.
  • He is traditionally identified as the founder or prophet of Zoroastrianism.
  • His teachings emphasize Ahura Mazda as the highest or only worthy object of worship in many accounts.
  • The historical date of his life is uncertain and ranges widely in scholarly estimates.
  • He is commonly linked with the Gathas, the oldest Zoroastrian hymns.
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Canadian context

Canadian readers may encounter Zarathustra mainly through studies of world religions, ancient Iran, and Friedrich Nietzsche’s *Thus Spoke Zarathustra*, a major philosophical work taught in literature and philosophy courses.[7][11]

Frequently asked questions

Who was Zarathustra?
Zarathustra was an ancient Iranian religious reformer and prophet traditionally regarded as the founder of Zoroastrianism.
Is Zarathustra the same as Zoroaster?
Yes. Zarathustra is the Avestan name, while Zoroaster is the more familiar Western form.
When did Zarathustra live?
His dates are uncertain. Sources place him variously in the second millennium BCE, around the 6th century BCE, or broadly between about 1000 and 600 BCE.
What did Zarathustra teach?
He is associated with devotion to Ahura Mazda and a moral division between truth and falsehood or good and evil.
What are the Gathas?
The Gathas are the oldest hymns in Zoroastrian scripture and are traditionally believed to have been composed by Zarathustra.
Why is Zarathustra historically important?
He is widely seen as the founder or reformer of Zoroastrianism, one of the major ancient religions of Iran and a significant influence on later religious history.

References

  1. Encyclopedia.comhttps://www.encyclopedia.com/people/philosophy-and-religion/ancient-religion-biographies/zarathustra
    Supports: Identifies Zarathustra as the prophet/founder of Zoroastrianism and gives the Western name Zoroaster.
  2. Encyclopaedia Britannicahttps://www.britannica.com/biography/Zarathustra
    Supports: Summarizes Zarathustra as an Iranian religious reformer and prophet; discusses chronology, Ahura Mazda, and scholarly uncertainty.
  3. Encyclopaedia Britannicahttps://www.britannica.com/summary/Zarathustra
    Supports: Provides a concise overview of Zarathustra/Zoroaster, his teachings, and traditional biography.
  4. Wikipediahttps://en.wikipedia.org/wiki/Zoroaster
    Supports: States that Zarathushtra Spitama, known as Zoroaster, is traditionally viewed as the spiritual founder of Zoroastrianism and associated with the Gathas.
  5. Encyclopaedia Iranicahttps://www.iranicaonline.org/articles/zoroaster-index/
    Supports: Explains that Zoroaster is the Western name for the prophet of ancient Iran and notes his role in the development of Zoroastrianism.
  6. Encyclopaedia Britannicahttps://www.britannica.com/topic/Thus-Spake-Zarathustra
    Supports: Confirms Nietzsche's *Thus Spake Zarathustra* as a philosophical work using the name Zarathustra as its title figure.