upon a quick search, you get slightly different results, depending on which language you use, because it appears that everyone wants to wage in a little on the interpretation of his laws. also, that's why you won't get a serious book about khan, because, well... mongols were busy with war and hunt to write books about him, and everyone else basically treats him as a monster. mongols, however, venerate him to this day, and i can fucking see why. he just wanted his people to be happy and rich. which he achieved. simple as. full stop.
Russian Federation