Ethical dualism or, as theorized by Descartes, between thought and extension. Ethical dualism on the other hand highlights the moral dimension instead or in addition to the metaphysical one, and envisions an inherent situation of conflict between two antagonistic forces, like light and darkness, Good and Evil. One of the most known and clear-cut interpretations of ethical dualism is the one conceptualized by Zoroastrianism, the ancient Persian religion, which bases its thought on the figure of the prophet Zoroaster (or Zarathustra), who claimed the existence of two original and contrasting principles, Ahura Mazda and Ahriman, respectively representing the forces of Good and
Zoroaster eastern Iran, including Central Asia, remain tentative". Zoroaster is recorded as the son of Pourušaspa of the Spitaman or Spitamids (Avestan "spit" mean "brilliant" or "white"; some argue that Spitama was a remote progenitor) family, and Dugdōw, while his great-grandfather was Haēčataspa. All the names appear appropriate of the nomadic tradition, as his father's means "possessing gray horses" (with the word "aspa" meaning horse), while his mother's is "milkmaid". According to the tradition, he had four brothers, two older and two younger, whose names are given in much later Pahlavi work. His training for the priesthood probably started very early,