fa شروط احراز ولایتعهدی در دوران اموی و عصر اول عباسی تخصصي تاریخ اسلام Islamic History پژوهشي Research Many Muslim thinkers believe crown prince should have some special conditions to achieve this position. This essay tries to examine how much Umayyad Caliphate and the first caliphs of Abbasids&shy;&shy; practically kept their vows to so called conditions and on its way the writer tries to dig up new resources research samples and documents.<br> A look on political events of this time shows that against all claims about necessity of some merits for achieving crown prince position these conditions and requirments never been respected practically and the main reason for appointment and election the crown princes and caliphs of this era was just to save personal or family benefits.&nbsp;&nbsp; خلافت, ولایتعهدی, شروط ولیعهدی, امویان, عصر اول عباسی the caliphate, the crown prince, crowning conditions, Umayyads, the first Abbasid era. 6 18 http://journal.pte.ac.ir/browse.php?a_code=A-10-2-63&slc_lang=fa&sid=1 Abbas Ahmadvand عباس احمدوند a.ahmadwand@gmail.com 1003194753284600108 1003194753284600108 Yes Saeid Tavoosi Masroor سعید طاوسی مسرور Saeed.tavoosi@gmail.com 1003194753284600109 1003194753284600109 No