Sumer was exemplary of nascent regimes where decisions made in isolation affected the lives of people thou-sands of kilometers distant. By virtue of personal connection and influence, this invariably led to concentration of wealth and political power. In a larger historical frame, this pattern has only been sporadically broken by revolt of a sorely oppressed populace before again reforming into another hierarchy.
These revolutions only proved that such stratification was an inevitable consequence of civilization as structured, as it invariably emerged again, albeit with a different ruling clique. The established culture of materialism made this ineluctable.