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Varying type of state is, in fact, basically derived from nature of state- making ideologies. Religious ideologies, in pre modern order, based on their modern or non - modern resulted in different political orders. Modernist religious ideologies pave the way for transition to a new order and then, without intervene in political spther, recognized Nationalism as the only state-making ideology in modern order. On the contrary, traditional religious ideologies, not only did not provide the ground for transition to new order, but also claimed state-making alongside nationalism.
In Iran, Islam as the ideology of pre modern order resulted in a different political order not conveniance for transittion to new order.