Is Evil Just a Lack of Something Good?

In the papercaus goahad and talk about it a little bit. So in the paper, you talk about the privation view of evil. And that's an augustinian view. The idea is that evil is a lack of something good. It's rather just a lack of goodness. But Kirk responded to that by saying: "It's not that that rock is evil, it's that it can contribute to a case of natural gratuitous suffering"