I only have moral arguments for moral questions. Certainly the idea that humans, because they are human and for that reason alone, have inherent worth is not exactly new. It is seductively easy to start thinking you're above other people because of what you have, or what you know, or what you can do. It's not true, but a relatively dirty part of ourselves certainly wants it to be.
"The basis for determining the value of human work is not primarily the kind of work being done but the fact that the one who is doing it is a person." [0]
“And sin, young man, is when you treat people like things. Including yourself. That’s what sin is.” [1]
[0] http://www.vatican.va/content/john-paul-ii/en/encyclicals/do...
[1] https://en.wikipedia.org/wiki/Carpe_Jugulum