Compare and contrast the political organization of Shang and Zhou China.

Shang: organized into kingdom with theoretically subject vassal states ruled by royal retainers; original vassals were descendants of original ruling families of small kingdoms that preceded Shang; vassals given control over commoners in their regions from which they obtained tribute sent on to royal family. Zhou:  also a feudal organization, but more closely controlled by royal family; vassal retainers often related to royal families; kings formally annexed all vassal states and controlled succession of vassals; vassals required to give formal oaths of allegiance; bureaucracy developed.