"Relativism does not claim there is no good or evil. It simply asserts you have no business telling me what they are and no right to enforce your conception of them."

So if someone is in process of robbing or murdering a stranger, you don't have right to say that is wrong and/or do anything to stop it?

"The social contract must be accepted by those who participate in it, not be dictated by a moralistic authority."

Well, most Protestant Christian believers would in general accept this idea- meaning they get their moral principles from their understanding of the Holy book- not from a Pope. And therefore in America at least, this has always been the generally accepted idea.

"Those who self righteously decry the rise of relativist morality are really more interested in imposing their own absolutist superstitions."

Who is decrying the rise of relativist morality, and what is relativist morality?