Inequality Fell as (Bronze Age) Mohenjo-Daro Grew (opens in new tab)

also: >the material record offers indirect evidence for distributed authority. Indus seals, small stone stamps that likely facilitated exchange and credit, were found primarily in private residences at Mohenjo-daro rather than in temples or central administrative buildings.

Speculative, of course. But cool data & approach. And it doesn't have to prove anything, except that it's plausible there are other ways to structure societies, that can have different results.