The monotheistic religion known as Zoroastrianism was founded by Zarathushtra (Zoroaster in Greek), which fundamentally progressed out of modern Iran sometime around the 18th century. Like the nomadic Hebrews, Zoroaster pronounced monotheism at a time when polytheistic religions prevailed. Similarly, he was attacked for this teaching, but Zoroastrianism became the state religion of the Persian empire. When the Islamic Arabs conquered Persia in 650 CE, Zoroastrians fled to India where most are concentrated today.
The Zoroastrian holy book is called the Avesta. This includes the original words of their founder Zarathushtra, preserved in a series of five hymns, called the Gathas. These are the core text of the religion and are sacred poetry.
The Zoroastrian holy book is called the Avesta. This includes the original words of their founder Zarathushtra, preserved in a series of five hymns, called the Gathas. These are the core text of the religion and are sacred poetry.