Muhammad Shaybani
After his conquests against Muhammad Shaybani, Kasym began to advance the power of the Kazakh state for the long term. He is credited with creating the first written code of laws for the Kazakhs, which he called "The Bright Road of Kasym Khan" as well as creating some of the first written records of the Kazakh language, which was written in the Arabic script until the early 20th century.