“…Earle & Kristiansen 2010). Large-scale exchange networks, through which metal and other goods and resources flowed, crossed the continent at unprecedented scales (Ling et al 2018;Melheim et al 2018;Quinn et al 2019). Bottlenecks at strategic points in these networks provided opportunities for emerging elites to turn the control of economic resources into political authority (Earle et al 2015), transforming previously autonomous communities into complex regional polities (Earle & Kristiansen 2010).…”