Justifiable forced migration

Forced migration is typically conceived of as an evil (Penz 1997 37), as something that ought morally to be avoided, but are there circumstances when it might be justifiable This is a question that is obviously relevant to scholars of deportation, as states often claim that expulsion (particularly of convicted non-citizen criminals) increases public security (Gibney 2013b). But the matter has received most attention by way of discussions of development induced displacement and resettlement (DIDR). 

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