الناصردین الله (حک :575-622ه) : خلیفه هوشمند و مدبر عباسی

Mahboubeh sharafi assistant professor, department of history & civilization of islamic nations, shahre rey branch, islamic azad university, shahre rey, iranby studying the caliphate of al-n?sir li-dinillah, the 34th abbasid caliph, this article tries to deal with the relations between the political intelligence and thought of caliphs and the socio-political development of the caliphate system in the islamic world. the outcomes of this research show that the history of the caliphate in al-n?sir li-dinillah period had outstanding political, cultural and economic developments. this caliph took effective steps in exaltation of material and spiritual power of abbasid and establishing the considerable unity by using the potential capacities of the islamic world. this was happened when the material power of the caliphs had been declined and they were not able to control the community.keywords: abbasid caliphate, al-n?sir li-dinillah.