Evil, a Glass as Clear as Mud
Evil is too diverse to say that it is something that a person is born with. There are too many parts. It is a learned thing, and for some it is all to easy to learn.
Here are some prime examples of evil that is learned.
An evil queen who wants to kill a kid for reasons only known to her? That is learned evil, an evil she may have even learned from her mirror on the wall.
A Ruler who wants to take over everyone, and force them to obey his many rules, a learned evil, maybe from school, or media, or their parents.
A little girl takes down every other little girl in order to bring herself up, is a learned evil, maybe learned from her parents or sibling.
No matter how big or small the evil it is learned. It is not a thing that a person is born with. And who knows maybe not all those people are evil, maybe it is the heroine.
Maybe in reality the queen was protecting another, and the girl who she killed was a monster.
Maybe the ruler was doing what was best for his people, and if he didn't do what he did they would be enslaved to another, much crueler person.
Maybe the little girl is bringing everyone else down, because they are stuck on a tall cliff and she can climb and take them to the bottom.
Evil is learned, and maybe, just maybe, there is no evil at all.