Evil is perhaps, the result of the human species not agreeing on what is evil.
In other words the very nature of evil, in any sense, is a judgment placed on experience. The fact that people may judge a situation differently, is one characteristic of evil.
Evil is that which comes from humans, and is directed outwardly and inwardly, with the final result being anything the stops peace from taking place.
This is exactly was is not or say, humanity is essentially very good (not perfect like it creator, but very good) and was created to do good, the use that they make of this capacity is what makes evil a sin, humanity has everything it need to do good, when it doesnt it corrupted and evil.