The pressures affecting the vitality of Zoroastrian Dari today are largely economic. In order to obtain an economic advantage, speakers are giving up their language for the dominant lingua franca of Iran, Persian. Parents intentionally do not transmit Zoroastrian Dari to their children in order that they may have what is felt to be an advantage in school and in life. The ethnolect loss can also occur more indirectly and less visible when people move to larger urban centers or abroad in pursuit of better economic opportunities; the lack of a complete ethnolect environment in which to immerse a child decreases or completely inhibits the transmission of the ethnolect to new generations. In past times, Zoroastrian Dari speakers experienced political pressures to yield up their ethnolect as well. The period since the seventh-century Muslim conquest of Persia has been a time of great persecution for the Zoroastrians of Iran. Political pressures have directly resulted in language loss when Zoroastrians have deliberately abandoned their ethnolect as a means of hiding their religion so as to escape persecution. Political pressures have also led to language loss indirectly; the oppression the Zoroastrians have been experienced under Iran's rulers has driven a steady stream of Zoroastrians to more tolerant areas, mostly the capital,
Tehran. Again, an environment where the ethnolect is spoken does not exist in these places, inhibiting the transmission of Dari to new generations. Linguists currently consider Dari to be in a state of language shift. Many of the language's speakers have assimilated to the dominant dialect and have given up—intentionally or unintentionally—their traditional ethnolect. Ethnolects like Dari are transferring from a state of maintenance, in which an etholect is being sustained in the face of pressure from a dominant dialect, to extinction, a state in which the ethnolect is no longer spoken. Many of Dari's dialects are facing extinction at an even more rapid pace than the language as a whole. Since each of Dari's many dialects has a smaller community of speakers, they are more susceptible to the forces driving the language towards extinction. Some dialects have already effectively reached extinction, for example, the Mohammadabad dialect, which, it is reported, possesses only a few speakers living in Tehran. The Kerman dialect, always susceptible because of the smaller size of its Zoroastrian population, also seems to be largely lost. ==See also==