The Earth Alliance is the official government of Earth and its colonies. It is a major galactic power in the twenty-third century.
The Earth Alliance is a multi-tiered democratic republic, governed as a whole through a balance of power between a regionally elected representative body called the Senate, a President who is elected by the Alliance population as a whole, and a Judicial branch. Both the Senate and the President have their offices in the Earth Alliance capitol, which is known as Earthdome. Earthdome is located on Earth in the city of Geneva, Switzerland.