Question of omniscience

[The One and Only...]

Originally Posted by Perndog

It can be correct if there is a particular set of guidelines that can be applied to make all of humanity coexist with the greatest possible harmony. Or it can be right on a micro scale if there is a such a system for a given group of people but a different system for another group.

You still haven't answered my question yet. What makes actions that create the greatest possible harmony objectively right? What force makes them correct?

I would imagine that those atheists who consider themselves moral are not arguing over morality as has been in the strictly philosophical sense. For example, most of us - even nihilists - would say that we shouldn't kill people, but that does not necessarily reflect on our beliefs regarding an absolute right or wrong.