 The dominant power(s) of the world is/are fluid, the initial period of US unilateralism can be loosely pinpointed to their interventions during the world wars.Following this period of rising US dominance on the world stage,

The predictions of these individuals represent the fluidity of power over time, through the idea that, during the period where the US was unequivocally dominant, people could still see the inevitable future, of a change in power and authority, on the world stage.Among the criticisms of the theory of posthegemony is Richard Johnson's, that it involves "a marked reduction of social complexity."