The question deserves a considered answer, which requires more than 140 characters.
There appears to be an assumption underlying the question: that human rights somehow flow from the existence of God. Since God does not exist in my world, this then raises the question of what is the origin of human rights, hence David’s asking of me.
Before responding to any of David’s suggestions, it is worthwhile considering how “human rights” manifests itself in global society. At one extreme, we have pro-choice groups which regard a woman’s body as hers to do with what she pleases during her pregnancies. At the opposite end of this particular spectrum, we have pro-life groups who sometimes resort to murder to achieve their aims. In another dimension, we have the debate on gay marriage which is currently polarising the USA.
On the basis of the foregoing, I suggest that whatever it is that defines human rights it is by no means universal. At the risk of appearing to duck David’s direct question, I can only respond by saying that ultimately it is the individual that defines what they consider to be their own human rights. This manifests itself in human rights protesters in both China and in front of abortion clinics, for example.
In terms of what society in general might regard as human rights, I leave to others to debate.
Thank you David for helping me to clarify my thoughts.