Sources of ijtihad from the perspective of general and specific jurisprudence

Ijtihad as the organized and methodical effort of the jurists to achieve the sharia rules, is as old as Islam.It is clear to everyone that ijtihad jurisprudence and the rules of Shari'a based on the sources of ijtihad and valid foundations are Shari'a which the most important of them are the principles of general rules and regulations, which God has stated in about 500 verses and the second important source is to know the tradition of the Messenger of God, in which the conditions and obstacles, the rulings were fully expressed. And this source has a very important role for the Mujtahid in deriving the rulings of the events of the event and the issues raised that other sources do not have such a role for him as an inference. It should be noted that if the sources of ijtihad jurisprudence in the system of the Islamic Republic can be accountable to the events and phenomena of life in all social, cultural, scientific, economic, legal, political, judicial, administrative, governmental and ... May ijtihad be used by jurists and mujtahids in them By doing so, it returns the new branches to the basic principles of the rulings and adapts the general rules of the rulings to external examples, and the development of jurisprudence in terms of branches and examples and its crystallization in terms of quality depends on this ijtihad.