Shamus, as I'm sure you know the Bill of Rights is the first 10 amendments to the US Constitution. Here's the preamble:
"We the people of the United States, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this Constitution for the United States of America."
Note the "to ourselves and our posterity". I think it's pretty clear our Constitution is for us.