I believe I have already touched on it. The founding fathers having come from England were influenced by its laws. In England to be considered a subject your father must have been a citizen and resided in the country. Thus a natural born citizen must therefore have a father who was/is a citizen and therfore subject to the United States
Yes, the Brits did fashion their law this way, including the right of decent. That is children of a citizen may happen to be born abroad but they are British Citizen non the less. In Natural law it is defined a little more tightly..
As such, George Romney was born in Mexico, but he was deemed to be a Natural Born Citizen because his parents were US citizens,
completely consistent with Natural Law. Same with John McCain being born in Panama.
Where as Obama's birth certificate clearly shows his father is Kenyan. In 1961 Kenya was a British Territory, and therefore a he was a Kenyan, a British Citizen by right of decent, consist with both British and Natural Law. By virtue of the 14th amendment he is also a US citizen, but not Natural Born Citizen.
Natural Law page 212 Book 1
"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."