"The Indus civilization (…) is doubly remarkable: first, because it was the only complex society of either Antiquity or the modern world, that operated without social stratification and the state; and, second, in what must be a related phenomenon, because it was an agrarian society in which the villages were not oppressed by the towns (…) In sum, Indus Civilization is by far the most egalitarian of any of the pristine Old or New World civilizations, and that by a long way and by any measure."
January 1, 1970
https://en.wikiquote.org/wiki/Indus_Valley_Civilisation