It’s been about 15 years on/off since I first looked at Monads. This weekend I finally sat down and really learned what they are, how they work. I found what looks like the seminal paper on them by Phil Wadler: https://page.mi.fu-berlin.de/scravy/realworldhaskell/materialien/the-essence... https://page.mi.fu-berlin.de/scravy/realworldhaskell/materialien/the-essence... I’m a pretty heavy Common Lisp guy, going on 30 years with it. I also did tons of SML and OCaml programming. But I only dipped my toe into Haskell a few times. What I was looking for was a more in-depth understanding of Monads and how they work. I remember reading that Wadler paper many years ago, and I was intrigued by the conciseness of changing the interpreter to do different instrumentation. I was hoping to find a magic bullet like that for my Lisp code. And I noticed that Lisp almost never makes any mention of Monads. Surely there is a benefit that could be had… Anyone else have Lisp experience using Monads? Did it offer some major enhancements for you? - DM