I believe "Evil" is subjective, and it does certainly dwell in us all. I make no effort to excuse the evil things I've done, or thought. I think "Evil" is purely a human condition, or experience. I don't believe there's evil in nature. With nature, there are just animals acting as they have been programmed by nature to act. Of course, this is a touchy subject, everyone's experience of evil is necessarily colored by their unique experiences and beliefs. There's validity in everyone's views.