Hegemony
In the 19th century, hegemony came to denote the "Social or cultural predominance or ascendancy; predominance by one group within a society or milieu". Later, it could be used to mean "a group or regime which exerts undue influence within a society". Also, it could be used for the geopolitical and the cultural predominance of one country over others, from which was derived "hegemonism", as in the idea that the Great Powers meant to establish European hegemony over Asia and Africa.
American imperialism
Other political scientists, such as Daniel Nexon and Thomas Wright, argue that neither term exclusively describes foreign relations of the United States. The U.S. can be, and has been, simultaneously an empire and a hegemonic power. They claim that the general trend in U.S. foreign relations has been away from imperial modes of control.