Prime Citizen was the highest government office obtainable by a resident of the United Planets of Earth (UPE).
Created in SEY 2546, the office was proposed by Ivar Messer I, then High-General of the UPE, in response to a series of bombings reported as terrorist attacks on multiple populated planets. After the Advocacy failed to apprehend those responsible for the bombings, the Citizens of the UPE voted to dissolve the executive council known as the Tribunal and establish the office of Prime Citizen. On December 15th of that year, Messer was elected Prime Citizen in a landslide victory.