Zoroastrianism, or Mazdayasna, is one of the world's oldest religions that remains active. It is a monotheistic faith, centered in a dualistic cosmology of good and evil and an eschatology predicting the ultimate destruction of evil. Ascribed to the teachings of the Iranian-speaking prophet Zoroaster, it exalts a deity of wisdom, Ahura Mazda, as its Supreme Being. Major features of Zoroastrianism, such as messianism, judgment after death, heaven and hell, and free will have influenced other religious systems, including Second Temple Judaism, Gnosticism, Christianity, Islam, and Buddhism. Following the Iranian Revolution and the arrival of the Islamic theocracy in Iran, Zoroastrianism is having a strong revival amongst many Iranians who want to express discontent towards the dictatorial theocratic regime.