I tend to think of evil as negative energies, or tendencies destructiveness. — Jack Cummins

I think evil is the unpleasant side of the cycle of life or evolution. Everything that I know of follows two rules. Survive and reproduce, provided the creature being produced isn't defective. Life or evolution does does not care how you survive and reproduce. So long as you do, or at least try to. Theft, poison, deception, murder you name it. Nothing is out of bounds in nature. While humans have labeled that kind of behavior evil, and seem capable of controlling it. It's just part of the cycle of life. What I have come to believe is. All humans are potentially evil, or we are quite capable of following our original set of rules. The question is, are you willing and able to control your evil.