By analyzing the judicial practices of American courts both theoretically and practically, and by comparing with other countries, this thesis mainly discusses the act of state doctrine in U.

To inquire into the behavior principles to the action of the nursing administrators, it is expounded in this article that the connotation of the behavior priciple; the using of the behavior principles in the nursing management.

The reasons exist in two ways, one is that state principle is replacing feudal principle; the other is the war between royalty and church power.

International Structure and State Behavior: “Dueling Realisms”;

Criteria for and scale of judgment of state behaviors are as a rule determined by behavior theory and structure of that country.

Among them,German scholars have put forward two opposing doctrines: the indirect effect theory and the direct effect theory;Americans judge the private effect of the constitution directly by the national behaviors,this so-called the national behavior theory.