they always insist that Leibnizian monad is not related to the FP monad at all, probably because it's a major point of pride of contemporary scientist to not be related to anything philosophical at all. sure.

still, i'm always wondering. why be so insistent. i mean, leibniz's monads are opaque substances that by itself have no causal relations with the world, but only affect each other/the world through "God". which sounds to me like an exact description of the IO monad

In a really roundabout way I think it does, but not directly. Not having had a background in FP at the time, but having read a lot of books about alchemy, my first conversation with a colleague about monads was the mirror reflection of your comment: “What are you talking about, this has nothing to do with Dr. John Dee.”