I was especially interested in this article -- "The Awful Truth of Catch-22" --exploring the meaning of Heller's novel. Summary of the author's point:
"I think Heller's argument was not with war or with death but with God. That the novel is less about the death of Snowden than "the death of God," as that theological tendency was known back then. That what the novel is really about is theodicy. Theodicy being of course the subcategory of theology which attempts (and studies the attempts) to reconcile human suffering, cruelty, and evil with the existence of an all-powerful, all-knowing, loving God. Heller doesn't think it can be done."