Using Bayesian phylogenetic analysis, the authors ask: "Do cultural traits exhibit different histories of transmission?". They explore two competing models regarding Iranian tribal textile tradition. First, the "hierarchically integrated system hypothesis" emphasizes the importance of a core tradition and peripheral traits that are shared among contemporaneous populations. Second, the "multiple coherent units hypothesis" suggests that the groups of cultural traits have different transmission histories. The results show more support towards the "multiple coherent units hypothesis", specifically that pile-weave designs emerge as a cultural unit with a unique phylogenetic history compared to other textile characters.