As I was teaching on the problem of evil today, I was struck by how nicely reincarnation could provide theodicies for recalcitrant cases. “Why is the fawn dying in the forest fire? Well, for all we know, it’s a reincarnation of someone who committed genocide and is undergoing the just punishment for this, a punishment whose restorative effect will only be seen in the next life.” “Why is Sam suffering with no improvement to his soul? Well, maybe the improvement will only manifest in the next life.”
Of course, I don’t believe in reincarnation. But if the problem of evil is aimed at theism in general, then it seems fair to say that for all that theism in general says, reincarnation could be true.
Here is a particular dialectical context where bringing in reincarnation could be helpful. The theist presses the fine-tuning argument. The atheist instead of embracing a multiverse (as is usual) responds with the argument from evil. The theist now says: While reincarnation may seem unlikely, it surely has at least a one in a million probability conditionally on theism; on the other hand, fine-tuning has a much, much smaller probability than one in a million conditionally on single-universe atheism. So theism wins.