Cible
I can see what you are saying, but the Constitution was not something that the Framers just made out of thin air. It was the culmination of the Magna Carta, Common Law, English Bill of Rights, historical perspective, etc.
Some of this "etc." included the writings of Sir William Blackstone in his [u]Commentaries on English Law[/u] which were tremendously influential in Revolutionary-Era America. More than anything, I think that Blackstone defined some very fundamental things in his writings, such as what a "right" is and the idea that "self defense being the first law of nature."
It was some of these comments that [b]helped[/b] spawn some of the Bill of Rights. Blackstone's comments merely provided impetus...
Oldeschool... as far as a cite goes, try:
#1 Commentaries p. 121 and 143-144,
and, #3 Commentaries, p. 4.
Caveat- I did not look this up directly, this is just the reference that I have on these quotes. Let me know if they are good cites.