"Ok, so you believe rights are an agreement between men. So why would you stick by your agreement " Because it’s to my advantage to live in a society where agreements are meaningful, rights are established and where principles and honor are respected. An Objectivist atheist recognizes that this is in his rational self interests. That’s the motivation for improving the lives of others. From what I know of Objectivists, they are generally no more of a pragmatist than Christians. I think you can predict my response to the “greater rights” part of your post.
If you are ever interested, there are more answers on Objectivism here. Sorry, but I can’t commit the time to continue this discussion.
The problem I have with your post to me and this one is that you're presuming that the other person you're dealing with at the moment shares your belief/perspective/opinion of the issue at hand. What if that person believes that YOU should come to his/her position? Both of you are acting in your own self-interest. Even if the desired results may be positive, there will still be disagreement-and perhaps fighting (literal or figurative)-because both sides perceive their position to be the correct one. That's what I mean by self-centeredness. It is the original sin every person is born with.