Where can I learn more about this perspective on OOP? I would really like to understand it in a way which is orthogonal to FP. In particular, do you think this perspective allows you to write better code in "multi-paradigm" languages that claim to support both FP and OOP? (I'm specifically thinking of Scala and OCaml here.) I have always felt that languages that try to do both end up being worse as a result, but maybe if I could understand the two concepts in orthogonal perspectives then I could make it work.