By Robert H.
Matt Yglesias has a post in which he off-handily says that the "legalize but don't give a path to citizenship" approach to existing illegal immigrants, seen in Jeb Bush's book, for example, threatens to create a new Helot class. This is unfair but, more importantly, bad classics.
Laconia had three broad classes in classical antiquity: helots, who were basically slaves; perioeci, who were basically free people with relative economic liberty and the ability to serve in the army, but who were not citizens; and spartiates, who were citizens and could vote and kick people down wells and stuff. Obviously Bush wants to create more of a perioeci class than a helot class, since he doesn't want immigrants to be serfs or murdered by children or anything.
But we can do better! Classical Hellas actually had a word for the class of people made up of resident aliens (usually) unable to acquire citizenship and (often) made to pay a fine (tax). What Jeb Bush wants is a Metic class.