Andrew, how about we look at it like this. We put aside for the moment the words “peer’ and “equal” and think of it like this. When mimesis occurs between persons in the same immediate life setting, violence is most likely to erupt, as the model, being very similar to the subject, is always potentially a rival. (Internal mediation) When mimesis occurs between persons of different life settings, e.g. different social class, physical distance, a mythical person etc. etc, rivalry is not possible, so there is no violent outcome. (External mediation)
Does this help?