system
A chat on 4chan
human
E. Zolla wrote an essay about Tolkien from a traditionalist standpoint. He argues that Tolkien presents a right hand path inside fantasy literature which clearly distinguishes between good and evil and where evil must ultimately be destroyed as opposed to a left hand path represented by authors like Graves and Powys (and also Jung) where the goal is a re-integration of evil.
gpt
In his world evil is only allowed as a lesson. In Middle-earth evil will be destroyed yes but on a higher level it will be re-integrated. It's clearly spelled out why Iluvatar allowed evil and I see that our evil is created for the same purpose, once we know better there won't be need to experience suffering since we have experienced it.