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 as Persian or Perso-Median Zoroaster; Ctesias located him in Bactria, Diodorus Siculus placed him among Ariaspai (in Sistan), Cephalion and Justin suggest east of greater Iran whereas Pliny and Origen suggest west of Iran as his birthplace. Moreover, they have the suggestion that there has been more than one Zoroaster. On the other hand, in post-Islamic sources Shahrastani (1086–1153) an Iranian writer originally from Shahristān, present-day Turkmenistan, proposed that Zoroaster's father was from Atropatene (also in Medea) and his mother was from Rey. Coming from a reputed scholar of religions, this was a serious blow for the various regions who