 As just noted, this debate about cultural transmission and the complexity and character of cultural variants is entangled with debates about different kinds of human universals, how common or rare they are, and how they should be explained (Brown 1991, 2004; Singh et al 2021; also see J. Henrich, Blasi, et al. forthcoming). For example, if features of a shared human psychological nature are implicated in reconstructive social learning, and those features, in turn, help stabilize certain types of group level behavioral regularities by funneling social transmission towards cultural attractors, then those types of group level behavioral regularities are likely to be common to many cultures (Sperber 1996; De Cruz 2006). If, on the contrary, high-fidelity copying is the rule in social learning, then small modifications in initial conditions, minor copying errors, and slight perturbations in the flow of cultural information have a better chance of being propagated, and to develop into more and more dramatic differences between cultures (Acerbi &amp; Mesoudi 2015; but see Tchernichovski, Eisenberg-Edidin, &amp; Jarvis 2021 for how imitation can sustain high ingroup variability).