Political theorists are much indebted to Joseph Carens for his 1987 article “Aliens and Citizens: the Case for Open Borders”. Written in a period of increased restrictions on migration, Carens’s article was pioneering in two ways: it introduced the migration question to political theory’s agenda and set the terms of the debate from the free movement side. Carens’s recent book, The Ethics of Immigration, is less pioneering. It explicitly aims to engage with the “conventional view of immigration” and to show that it can accommodate some measures which improve citizenship and admission policies. The open borders argument is not abandoned but is left to only one of the twelve chapters. Carens’s main concern, however, is to show that the open borders argument does not conflict with the measures he proposes.
It is possible to have the opposite concern: are the proposed measures a way to advance towards a world of open borders? In other words, is Carens still advocating open borders? My analysis here will be limited to the first measure he proposes in the book, this is that “justice requires that democratic states grant citizenship at birth to the descendants of settled immigrants” (p. 20). Whether justice requires this or not, many “democratic states” already conform to this principle and my argument is not that they should stop. Rather, my worry is that such an argument is not a way to advance towards an open borders world.
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