Here I sort of disagree. It's meaning was the axiomatic extension of the "natural law" foundation of the nation.
As the nation was founded on "natural law", the meaning of "natural citizen" derives from that body of philosophical work.
“Here I sort of disagree. It’s meaning was the axiomatic extension of the “natural law” foundation of the nation.”
It doesn’t matter what the foundation was. The Naturalization Act of 1790 specifically defines “natural born” as children of citizen parents, and “natural born” is a concept carried over into the Constitution.