Before revision: Following the dissolution of the Soviet Union in 1991 the United States was the world's sole hegemonic power.Hildebrandt, R., US Hegemony: Global Ambitions and Decline : Emergence of the Interregional Asian Triangle and the Relegation of the US as a Hegemonic Power, the Reorientation of Europe, Peter Lang, 2009, pp.
After revision: ,Following the dissolution of the Soviet Union in 1991 the United States was the world's sole hegemonic power.Hildebrandt, R., US Hegemony: Global Ambitions and Decline : Emergence of the Interregional Asian Triangle and the Relegation of the US as a Hegemonic Power, the Reorientation of Europe, Peter Lang, 2009, pp.