The Constitution is, as a matter of fact, 18th Century Law. Unfortunately it does not define "Natural Born Citizen", but uses the term. So proponents of various definitions of what NBC means have taken to quoting things like 18th Century Law Dictionaries to make their case.
I don't think that that technique has been particularly effective.
The Constitution is also 146 years old, when the 14th Amendment was adopted in 1868 stating that there are only two forms of citizenship: born and naturalized.
The Constitution is also only 22 years old, when the 27th amendment was adopted in 1992 after having been originally proposed by James Madison in 1789, 202 years prior to ratification.
The Amendments are additional Articles of the Constitution.
The only reason it hasn’t been effective is about 3 generations of communist/socialist takeover of all institutions in our country. Up until pretty recently it was accepted and known that a NBC meant citizen parents, born on US soil.
I don’t see any way out of this that is pretty.