I think you bring up an excellent point about the definition of words here. Evil defined = to serve ones self at the detriment to others. How does one determine who is what?
Through their actions; If society chooses to reward that behavior there will be more of it. Who decides? IDK, good question, perhaps a group of intellectuals that can debate in a public forum without consequences.
This used to be a thing in the ancient world & what ignited modern civilization. Good ideas prove themselves & bad ideas do not.
It is up to the individual to decide for themselves what to accept or reject.