American hegemony refers to the dominance of the United States in global politics, economics, and culture since the end of World War II. This influence is characterized by the U.S. leading international institutions, such as the United Nations and the International Monetary Fund, and promoting its values, including democracy and free markets. The concept also encompasses military power, with the U.S. maintaining a significant presence around the world through alliances like NATO. Critics argue that American hegemony can lead to unilateral actions that may not consider the interests of other nations, while supporters believe it promotes stability and prosperity globally.