&gt; The attempts to introduce monads in other languages like Python, Ruby etc. is missing what make them a useful tool in Haskell.<p>While I agree that the syntactic sugar of the &quot;do&quot; notation in Haskell makes Monads vastly more useful, there are examples where Monads have been applied in other programming languages without any syntactic sugar.<p>For example, there are parser combinator libraries (influenced by Parsec) in many languages. E.g. Python&#x27;s pyparsec is internally using monads that are defined just as they are in Haskell.<p>Monads are a great idea for many practical tasks in programming, their use in Haskell is often emphasized becuse they&#x27;re required for IO (which is not the case for imperative languages). For many of the non-IO applications of monads, they&#x27;re just as useful in other languages too.