It's basically atheist narnia, so that makes sense.
...it is?
I found it hopelessly nihilistic and self-defeating as a moralistic tale; the big moral struggle is against Original Sin, but it is framed in the end in some New Sin instead.
It only made sense to me as a story about one monolithic Authority being replaced by another, which institutes rules to try to prevent themselves from being supplanted by the same means in the future.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.