Human equality without God?

Many, including our own Michael Perry, have explored the question whether the "morality of human rights", or claims about "human dignity", are meaningful if it is not the case that human beings are created, sustained, and loved by God.  In this piece ("If There's No God, Are Humans Equal?"), philosopher Christopher Kaczor engages a version of the question.  (The piece of a review of  Our Declaration: A Reading of the Declaration of Independence in Defense of Equality, by Danielle Allen.)  He asks, "[h]uman equality clearly ­cannot rest on qualities such as wealth, virtue, and intelligence, which are ­unequally distributed among us. So, what is it that makes all of us equal?"  Good question!