Still, we are led to the question:

How did Girard’s “mimetic rivalry” operate in the Lebenswelt of constrained complexity, that is, in the Lebenswelt that we evolved in?

How could “mimetic rivalry” have enhanced “reproductive success” (the new term for “survival of the fittest”)?

It seems to me that “mimetic rivalry”, as Girard formulates the concept, would have increased intragroup competition and conflict (even with the catharsis of scapegoating).  Mimetic rivalry would have diminished reproductive success in a world of intergroup competition.