On the basis of a systemic study on Tuyuhun s local administrative organization, this paper figures out thatits evolution experiencedthree stages, that is, the stage of tribes under the chiefdom, tribes under the chiefdom and clan, and tribes under the khanate.

This article takes an analysis a-bout the backgroud , the formation and the evolution of the Chinese prehistoric walled town sites , and considers that the origin of the Chinese civilization has developed from two kinds of prehistoric country modes ; the alliance and the chiefdom .

The chieftain-state theories that contemporary anthropologists bring up have the positive meaning to perfect Marxism for the relevant human earlier period society evolution, also have the positive meaning to ancient national origin and formation in China.

For understanding American federal politics,it is necessary to make clear of the connotation and the basic theories of American federal politics like contract theory,power limitation theory,double responsibility theory,scale political theory and autonomy governance theory.