The modern concept of "rights" came from the French Philosopher Jean-Jacques Rousseau.
No, the modern understanding of "rights" came from a philosopher.
It's been in our gene's since day one of our existance. We deserve the right to life, liberty, and the persuit of happiness.
To suggest that one man invented freedom is to also say that one man invented oppression. They have both been a part of us for enternity.
Besides, such a atheistic point of view about our Declaration of Independence and Constitution would suggest that
A: you don't have faith in who(what) the authors followed.
B: you feel that "rights" are subjective
AND
C: you feel that there is nothing that assures you have rights aside from that piece of paper that you have already expressed a lack of total trust in.
Rights are God given, and protected and held dear by those who acknowledge those rights.