Galactic empire

For the fictional autocracy, see Galactic Empire. For other uses, see Galactic Empire (disambiguation).
"Imperial Empire" redirects here. For empires that were "Imperial" related or use the term "Imperial", see List of empires.

Galactic empires are a science fiction setting trope, in which most or all of the habitable planets in the setting's galaxy are ruled by a single centralized political entity. Galactic empires most frequently appear in works in the sub-genres of science fantasy and space opera, although they may appear in other sub-genres as well. Works featuring galactic empires may have them as the story's focus, chronicling the empire's growth and/or decline. Alternatively, they may merely serve as a backdrop against which the events of the story play out.

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