Realism VS. Idealism
•IR theorists re-emphasized the role of power in global governance.
•Many IR theorists blamed the weakness of the League of Nations for its idealism (contrasted with Realism) and ineffectiveness at preventing war, even as they blamed mercantilist beggar thy neighbor policies for the creation of fascist states in Germany and Italy.
•With hegemonic stability theory, the concept of the U.S. national interest was expanded to include the maintenance of open sea lanes and the maintenance and expansion of free trade.