I’m consistently in favor of increased immigration, and skeptical of the arguments against (such as those based on notions like “importing crime”, “importing poverty” or “watering down culture”).
However, if the arguments against immigration fail, how about the quality of the arguments in favor? Poverty reduction is a strong one: the prosperity of immigrants obviously increases when they are allowed to immigrate, but so does the prosperity of the families left behind (as a result of remittances). But a more interesting argument is based on the concept of the common ownership of the earth. Humanity collectively owns the earth and its resources because the earth is simply there. No one has created it and no one therefore deserves credit for it. Consequently, all individuals have an equal claim to every part of it and collectively own every part of it. (That’s an old idea, going back at least to Kant and Grotius).
Accidents of birth do not destroy this common ownership. They don’t yield private ownership rights to those parts of the earth where they take place. Hence, these accidents should not determine who gets the exclusive usage rights over parts of the earth. Immigration restrictions are morally arbitrary since they differentiate between people based on the lottery of birth. They take the accident of being born somewhere and turn it into a rule to stay there. They are equivalent to other morally arbitrary differentiations, such as those based on race or gender. However, contrary to what happened to those other differentiations, a majority of public opinion has yet to be convinced of the morally arbitrary nature of immigration restrictions.
From the notion of the common ownership of the earth follows that every kind of private property, not only the state as the exclusive property of a part of the earth claimed by the citizens who happen to live in that state, is a privatization of common resources. I think any justification of such a privatization, and therefore any justification of any type of private property, is bound to be difficult.
If the justification of privatization – whether of territory or commodities – does not succeed, then private property and the state are by definition illegitimate. So there’s a lot at stake here. The reason why such a justification is difficult, is that private property is necessarily based on an original theft of common ownership. Even if you cultivate the land you appropriate or privatize (or better steal from the collective of humanity), and even if you incorporate your labor in the product you make based on natural resources (Locke’s justification for private property) and thereby create added value, that doesn’t change the original sin: you’ll still be like the thief who takes care of the car he’s stolen and gives it a new color.
The same is true for a farmer fencing a part of the earth, a state imposing a border and restricting immigration, an oil company extracting the oil and refining and selling it, and a primitive tribe settling down in the jungle somewhere and keeping strangers out. Even nomadic tribes are guilty of the same sin by letting their cattle graze the land and keeping other tribes away.
So this reasoning a priori invalidates all talk about immigration restrictions. But it seems that I have proven too much: all private property, not just private property of land or a country, is, in the words of Proudhon, theft. Yet, private property is extremely important from the point of view of human rights. Private property also seems to be fueling economic efficiency, as the communist experiments have shown, a contrario. Especially private property of land – important in the context of immigration – is important for prosperity. I don’t want a justification of policies removing immigration restrictions that destroys all possible justifications of all forms of private property. Moreover, while I consider existing immigration restrictions unjust, I do recognize the value of some types of restrictions. Some restrictions used by citizens to limit access to a territory that they claim is theirs are legitimate. A state is necessary for democratic self-government and for the legal and judicial protection of human rights, and it would seem impossible to imagine the concept of a state without some immigration restrictions.
These are moral goals – rights, democracy – that are at least equivalent to the moral goal of not stealing and to the moral rights of immigrants. The problem is that stealing – namely stealing a part of the earth from humanity – is precisely what seems to be necessary to achieve these moral goals. So we have a conflict between moral goals. The fact that these moral goals all seem to be equivalent – it’s not obvious that stealing is always more wrong than protecting human rights for instance – indicates that it should be conceivable to violate – or limit the force of – the principle of the common ownership of the earth in order to create private property, both of commodities and land/territory. Hence, immigration restrictions are not necessarily morally wrong, although I would still claim that the existing restrictions of all countries in the world go much too far: they don’t take the moral claim of the common ownership of the earth seriously enough, and they overemphasize the goals of residents over those of immigrants.
So how exactly do we balance these different and equivalent moral goals? For example, a country violating human rights has less rights to impose immigration restrictions because such restrictions will not serve the goal of rights. (Unfortunately, this won’t promote migration since such a country will not attract many immigrants if it winds down its immigration restrictions). A wealthy country – like wealthy people – have less rights to exclude others from a share of their wealth, since their wealth is based on the use of common property. In that case, immigrants can demand entry rights based on common property.
While national borders are drawn in a morally arbitrary way, as argued above, and while immigration restrictions that go together with the drawing of such border are therefore equally arbitrary, they are not morally meaningless. They are a morally arbitrary fact that has acquired moral significance: they have resulted in a tool – the state – that can do morally good, e.g. protect human rights and democracy.