Pax Americana refers to a period of relative peace and stability in the world, particularly after World War II, largely due to the influence and power of the United States. During this time, the U.S. emerged as a global superpower, promoting democracy, free markets, and international cooperation through institutions like the United Nations and NATO. This era is characterized by American military, economic, and cultural dominance, which helped to deter major conflicts between great powers. While it has led to significant global development, it has also faced criticism for interventions in other nations and the implications of American hegemony on global politics.