No such thing as "good" or "evil." These are relative and subjective...

...with any number of possible interpretations or valuations.

What is more real, more useful and more practical is that in dealing with others, you can treat people with kindness, or with cruelty.*

In some ways still a false dualism, but much more valuable for living in the world.

Don't seek to "do good."  Try to be kind.  Don't try to avoid "evil."  In the immortal words of the King - "Don't Be Cruel."

*I'm stealing this idea of good/evil vs kindness/cruelty from someone or something I've read recently, but for the life of me can't remember where.  The closest I could track is from this post on Brad Warner's blog on the difficulty of judging what is good and evil in the context of the Buddhist precepts, but there was something else as well.  Ah well, all attribution to the Akashic Records, I guess.