That's been the biggest con job, hasn't it?
That somehow society determined what is good and bad is a complete farce. Outside of biblical faith, there are no boundaries since everything is merely relative. That's why we've seen our society move so quickly into the "my truth" delusions.
Looking at the history of the middle east and most any land mass, societies have not been bound by any moral code that didn't originate with faith. While there is no question that laws are designed to keep people from hurting each other, and the abrogation of those laws by leadership and industry seems to be evidence only of intended control, that was never the source of law. It was only the legalistic/lawfare abuse of it by those without faith in God (or in many cultures gods/ancestors).
Evil is not simply what we determine it to be. It does not wear a badge or other identifier declaring it's wickedness. Evil is doing harm to a neighbor or to God's authority and reputation. Disobedience to God is the definition of evil in the Bible. Outside of the Bible, there are simply changeable laws to regulate relative behavior