Attention is paid kummskie theologians in his writings, teachings of the "extreme", made it seem, Iraqi Shiites rise to accusations of "extremes" kummiytsev themselves. Kummskie scientists have made a significant contribution to the historiography of the Shiite. Kumm was actually the second largest and most important center of Shiite scholarship after Kufa. Of the 70 scientists who work in the subject of separate essays, each second - "kufiets, one in five - kummiets, and flourishing kummskoy school falls in the second half of the III / IX century. The leading role played in this school are recognized scholars in the Shia world, as Ahmad b. Muhammad al-Ashgar. Muhammad b. al-Hasan b. Sahl Abu al-Hassan, nicknamed Shaylama l (f cowl '). The Secretary and close associate 'alibi. Muhammad, the leader of Zanj. The son of a famous last vizier and his nephew is not a lesser-known statesman, Muhammad b. al-Hasan took an active part in the uprising Zanj in Iraq, and after the defeat of the revolt in 271/884, he got no mercy from the Caliph al-Muwaffaq and moved to Baghdad. In 280/893, in Baghdad, was discovered a plot against the Caliph al-Mu'tadida, and one of the organizers of this conspiracy was Shaylama. Together with his nephew from the Medina and a group of like-minded, he was arrested.A search of his home found a list of persons from whom he took the oath Shaylama, acting on behalf of the mysterious Alida. The investigation revealed that the conspirators had intended to speak openly in Baghdad, seize the residence of the Caliph al-Mutadida, kill him and proclaim the mystery Alida caliph, which was conducted on behalf of the propaganda. Among the military leaders were sworn Shaylame, judges, most of the Hashemite elite, the people of Baghdad, molodezh4. However, none of those arrested could not name the name of the mysterious Alida, because they dealt only with Shaylamoy - the only mediator between the oath and the Alid.Al-Mu'tadid different ways trying to find out from Shaylamy name Alida, according to the commandment which he acted. However Shaylama flatly refused to give his secret and took an agonizing kazn5.It was noted above that Shaylama took an active part in the uprising Zanj (black slaves). As a close ally of the leader and knowing his Zanj correspondence, Shaylama was devoted to the management plans for the insurrection, and knew well the internal organization and the actual history of the uprising.Stories of struggle Zanj Shaylama devoted dva6 works:A. K. Al-Akhbar Sahib Zinj wa * vaksSi ikhi ("Tales of the leader and his battles Zanj") 2. K-rasa'ilihi ("The Book of his Epistles"). In addition, al-Mas'udi causes the name of another composition Shaylamy 3. K. Al-Akhbar fi mubayyada ("The Book of stories about the" dressed in white ") 7 - the so-called enemies the Abbasids, as they preferred white clothes and black color banners banners Abbasid (al-musavvada).