Mongol Empire to some extent for murder. Any resistance to Mongol rule was met with massive collective punishment. Cities were destroyed and their inhabitants slaughtered if they defied Mongol orders. Under "Yassa", chiefs and generals were selected based on merit. The empire was governed by a non-democratic, parliamentary-style central assembly, called kurultai, in which the Mongol chiefs met with the great khan to discuss domestic and foreign policies. Kurultais were also convened for the selection of each new great khan. Genghis Khan also created a national seal, encouraged the use of a written alphabet in Mongolia, and exempted teachers, lawyers, and artists
Nayan (Mongol Prince) support Nayan's rebellion, Kaidu remained a potent threat for the remainder of Kublai Khan's life. Kublai chose not to regard Nayan's Nestorian Christian co-religionists as guilty by association, and refused to allow them to suffer any level of persecution within his lands. In the wake of the suppression of Nayan's rebellion, Kublai Khan was able to begin to fully incorporate the lands and peoples previously dominated by the appanage princes into his domain. Nayan (Mongol Prince) Nayan was a prince of the Borjigin royal family of the Mongol Empire. He raised a noteworthy and serious rebellion against the Mongolian Khagan,