Following the death of Genghis Khan in 1227, his empire was divided among his four sons and his family members. Despite the potential for serious fragmentation, Mongol law of the Mongol Empire maintained orderly succession for several more generations, and control of most of Mawarannahr stayed in the hands of direct descendants of Chaghatai, the second son of Genghis. Orderly succession, prosperity, and internal peace prevailed in the Chaghatai lands, and the Mongol Empire as a whole remained strong and united.