If you believe that someday you will stand before a power who will judge you according to your actions, then there is absolute right and wrong that will be dictated by whoever judges you. If you don't believe that then do whatever you want. Use whatever philosophy or intellectual reasoning that will justify yourself. I would say the latter view is prevalent in humans based upon their actions.

I personally believe I will stand in judgement. And it has been a safe guide to me, making my life better. My personal belief is that it doesn't matter what perspective you have, or what is written in the history books. It doesn't matter what popular opinion says happened. Right and wrong are absolutes. Nobody rapes, kills without cause, or steals and remains innocent. Regardless of perspective. They may escape punishment in this life, may have books written in their honor, and enjoy honor from like minded people but they will be judged according to their deeds.

How's that for an extremely narrow and naive view. Works for me. If you violate the natural laws set before us and don't find a way to reconcile with the power that will judge you, you deserve to burn in hell. And I'd hate to find out what it would take for people like Hitler, Manson, Stalin ect. to find forgiveness.

(puts soapbox away)