This by John Piper is about as close as I've seen in answering my blog's hypothesis.
He does a masterful job of analogizing how humans are different from all other animals, how God is different from humans, and how all rights which we may presume are inherent to humans by nature of our being are originally due to God.
"Where the rights of our Creator and Savior are daily denied with impunity, we should not be surprised that the rights of persons created in his image are denied in a cavalier and selfish way. Until God is given his rights, no human rights will have significance beyond convenience. And when they are no longer convenient, they will be ignored..."
Note: I have just finished A.W. Tozer's "Born After Midnight," which I read on and off for a few months, as my nightly devotional. Fantastic. If your google-fu is strong, you may be able to find a pdf copy online. My morning devotional is John Piper's "Taste and See." I'm sure all of his essays therein are free online, but this book version is nicely printed and IMHO worth it.