From Vattel’s Law of Nations. Sections 212 to 217.
§ 212. Citizens and natives.
The citizens are the members of the civil society; bound to this society by certain duties, and subject to its authority, they equally participate in its advantages. The natives, or natural-born citizens, are those born in the country, of parents who are citizens. As the society cannot exist and perpetuate itself otherwise than by the children of the citizens, those children naturally follow the condition of their fathers, and succeed to all their rights. The society is supposed to desire this, in consequence of what it owes to its own preservation; and it is presumed, as matter of course, that each citizen, on entering into society, reserves to his children the right of becoming members of it. The country of the fathers is therefore that of the children; and these become true citizens merely by their tacit consent. We shall soon see whether, on their coming to the years of discretion, they may renounce their right, and what they owe to the society in which they were born. I say, that, in order to be of the country, it is necessary that a person be born of a father who is a citizen; for, if he is born there of a foreigner, it will be only the place of his birth, and not his country.
§ 213. Inhabitants.
The inhabitants, as distinguished from citizens, are foreigners, who are permitted to settle and stay in the country. Bound to the society by their residence, they are subject to the laws of the state while they reside in it; and they are obliged to defend it, because it grants them protection, though they do not participate in all the rights of citizens. They enjoy only the advantages which the law or custom gives them. The perpetual inhabitants are those who have received the right of perpetual residence. These are a kind of citizens of an inferior order, and are united to the society without participating in all its advantages. Their child follow the condition of their fathers; and, as the state has given to these the right of perpetual residence, their right passes to their posterity.
§ 214. Naturalization.(58)
A nation, or the sovereign who represents it, may grant to a foreigner the quality of citizen, by admitting him into the body of the political society. This is called naturalization. There are some states in which the sovereign cannot grant to a foreigner all the rights of citizens, — for example, that of holding public offices — and where, consequently, he has the power of granting only an imperfect naturalization. It is here a regulation of the fundamental law, which limits the power of the prince. In other states, as in England and Poland, the prince cannot naturalize a single person, without the concurrence of the nation, represented by its deputies. Finally, there are states, as, for instance, England, where the single circumstance of being born in the country naturalizes the children of a foreigner.
§ 215. Children of citizens born in a foreign country.
It is asked whether the children born of citizens in a foreign country are citizens? The laws have decided this question in several countries, and their regulations must be followed. (59) By the law of nature alone, children follow the condition of their fathers, and enter into all their rights (§ 212); the place of birth produces no change in this particular, and cannot, of itself, furnish any reason for taking from a child what nature has given him; I say “of itself,” for, civil or political laws may, for particular reasons, ordain otherwise. But I suppose that the father has not entirely quitted his country in order to settle elsewhere. If he has fixed his abode in a foreign country, he is become a member of another society, at least as a perpetual inhabitant; and his children will be members of it also.
§ 216. Children born at sea.
As to children born at sea, if they are born in those parts of it that are possessed by their nation, they are born in the country: if it is on the open sea, there is no reason to make a distinction between them and those who are born in the country; for, naturally, it is our extraction, not the place of our birth, that gives us rights: and if the children are born in a vessel belonging to the nation, they may be reputed born in its territories; for, it is natural to consider the vessels of a nation as parts of its territory, especially when they sail upon a free sea, since the state retains its jurisdiction over those vessels. And as, according to the commonly received custom, this jurisdiction is preserved over the vessels, even in parts of the sea subject to a foreign dominion, all the children born in the vessels of a nation are considered as born in its territory. For the same reason, those born in a foreign vessel are reputed born in a foreign country, unless their birth took place in a port belonging to their own nation; for, the port is more particularly a part of the territory; and the mother, though at that moment on board a foreign vessel, is not on that account out of the country. I suppose that she and her husband have not quitted their native country to settle elsewhere.
§ 217. Children born in the armies of the state.
For the same reasons also, children born out of the country, in the armies of the state, or in the house of its minister at a foreign court, are reputed born in the country; for a citizen who is absent with his family, on the service of the state, but still dependent on it, and subject to its jurisdiction, cannot be considered as having quitted its territory.
I have tried to demonstrate that English speakers at the time of the drafting of the Constitution associated natural-born with lineage and distinctively native-born with place.
ML/NJ