Abstract

When can or should citizenship be granted to prospective members of states? When can or should states withdraw citizenship from their existing members? In recent decades, political philosophers have paid considerable attention to the first question, but have generally neglected the second. There are of course good practical reasons for prioritizing the question of when citizenship should be granted—many individuals have a strong interest in acquiring citizenship in particular political communities, while many fewer are at risk of denationalization. Still, loss of membership in a political community is a practice with a long history that continues to take place today. Concerns about national security have recently led several liberal democratic states to pass, strengthen or consider legislation that would empower their governments to denationalize certain persons.] At the international level, formal norms governing denationalization are vague and generally toothless, and there are no international legal norms that restrict denationalization to citizens who hold another citizenship or wish to take up citizenship elsewhere (Worster, 2009). So it is important to determine whether there are conditions under which denationalization can be morally justified and, if so, what those conditions are. We shall argue that while denationalization is ordinarily impermissible, there is a class of crime committed by citizens that may render it not only permissible, but a fitting response on the part of the state.