Why did moctezuma reorganize the aztec government?

Moctezuma was the second Aztec from 1440 to 1469 emperor and during his government, the Empire was consolidated, territorial expansion was done, and Tenochtitlan became the dominant partner of the Aztec Alliance.  

Moctezuma was the son of emperor Huitzilihuitl . After his father’s death, Moctezuma's brother ruled for some years and then he was elected to power.  Moctezuma solidified the alliance with neighboring states, bringing social, economical, and political reforms that were beneficial to the relations with other tribes and gave them access to exotic things such as cocoa, rubber, cotton, fruits, feathers, and seashells.