A cosmic dualism is a religion in which there are two universal powers. Typically, one represents good and the other represents evil. The most prominent example of this philosophy can be found in Zoroastrianism, which has two original spirits: Ahura Mazda, the Eternal and Uncreated, the Wise Lord, and Angra Mainyu, Uncreated but not Eternal, the Evil Spirit. It is worth noting that this notion of dualism was a major influence in the development of both Christianity and Islam, although the dualism in both these religions (and in Zoroastrianism itself, according to some interpretations) is a spiritual dualism rather than a cosmic dualism.