Critical study of different approaches in jurisprudential criteria of Islamic State laws

One of the most important requirements for the realization of the Islamic state is to base the legal system of the Islamic state on religious principles and criteria. The debate about the religious criterion of the Islamic state law has been going on for a long time, from the constitutional era to the present day, and it has been intertwined with the basic question of the necessity and what is the religious criterion of the Islamic law.This research, following the answer to this question, tries to find an answer regarding the Islamic system by delving into the ideas of this field and criticizing and evaluating them.This answer is based on the assumption of the systematicity of Islamic thought, the feasibility of acting on the ruling jurist's fatwa, and its comprehensiveness and breadth compared to other views in this field.Therefore, the jurist's fatwa is the closest fatwa to public interests.