United States of America (Centralized Empire)

This is the living superpower of the world. First in Economy, Military Spending, stockpile of active Nuclear Weapons, and Size of EEZ. Second in stockpile of Nuclear Weapons. Has oil, uranium, and many valuable materials. One of the members of five permanent members of UNSC.

They used to have a rival, Soviet Union, but after USSR's defeat, no nation could usurp nor even dare to think about its supreme position.