 Textbook Copenhagen: To a good extent RQM is a completion of the standard textbook interpretation. The difference is that the latter assumes the existence of a classical world, or a classical observer, and describes the way quantum systems affect it in an interaction. The relational interpretation, on the contrary, assumes that this description is valid with respect to any physical system. Thus, RQM is a sort of “democratised” Copenhagen, where the role of the single observer can be assumed by any physical system.