Diaspora
A diaspora was a population of individuals who were scattered or dispersed, typically involuntarily, outside of their homeland; a country, world, or other location of origin.

The Great Diaspora was the name for a period of Xindi history which described the aftermath of the destruction of the Xindi homeworld Xindus. ()

See also 
 Amargosa Diaspora
 Migration
 Refugee

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Culture
Societal classifications‎