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.
Restraint (book)
The first half of the book addresses liberal hegemony. Liberal hegemony is defined as "an activist grand strategy that aims to assertively maintain U.S. dominance and the 'unipolar moment' in the service of liberalism and national security," Posen argues that liberal hegemony is the grand strategy that the United States has followed since the end of the Cold War and that it has been a failure, calling it "unnecessary, counterproductive, costly, and wasteful."