 What, then, can we conclude from this model regarding the evolution of fair division? It all depends, of course, on how accurately the replicator dynamics models the primary evolutionary forces (cultural or biological) acting on human populations. Although the replicator dynamics are a “simple” mathematical model, it does suffice for modelling both a type of biological evolution (see Taylor and Jonker, 1978) and a type of cultural evolution (see Börgers and Sarin, 1996; Weibull, 1995). As Skyrms (1996) notes: