What were some of genghis khan’s accomplishments as a ruler?

1.Genghis Khan replaced cronyism with meritocracy
2.Genghis Khan (if  Genghis Khan and the Making of the Modern World by Jack Weatherford to be believed) also christened his nation: Mongolia was first called as such by his Kulruitan.
3.enghis Khan imposed a much more efficient social and military structure. Previously, as said, people were grouped by birth: in clans and tribes. Genghis Khan grouped 10 men into a group (squad?), 10 squads into a company, 10 companies into a regiment, etc. This, like the Chinese historians described, allows him to command his regiments like his arms, while regiments command companies like elbows, and companies command squads like fingers.
 thats three for you if you need more let me know