Why do we know so little of the power structure in the indus valley?

The power structure of the Indus Valley Civilization remains largely elusive due to the lack of decipherable written records and the absence of monumental inscriptions that typically convey hierarchical information. Archaeological findings suggest a complex urban organization, but the absence of palatial structures or definitive evidence of centralized authority complicates our understanding. Additionally, the civilization's decline and subsequent cultural shifts have obscured its historical context, leaving researchers to rely on indirect evidence and interpretations.