CoDominium

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CoDominium is a series of future history novels written by American writer Jerry Pournelle, along with several co-authors, primarily Larry Niven.

The CoDominium (CD) is a political alliance and union between the United States and the Soviet Union in Pournelle's fictional history. Formed to maintain planetary stability, the CD becomes a de facto planetary government and later an interstellar empire, though it halts scientific and political evolution. The U.S. during the CD era is a welfare state with distinct social classes: Citizens and Taxpayers. The empire is organized by sectors, ruled by a Viceroy, and governed by various ministries.

Colonies in the CoDominium are established on habitable planets, founded by various groups such as ethnic minorities, religious groups, and businesses. Elite colonies have advanced technology and fleets, allowing them some independence from the CD. The Outies, systems that retained enough technology to pose a threat, serve as a constant challenge for the Imperial Navy. Jennifer R. Pournelle's novel Outies is a sequel that explores themes of alienation and the impact of biology on destiny.