Harappan Civilisation is often characterised (for example by the Director of the British Museum on a Radio 4 series) or even idealised as peaceful and without warfare or conquest, (in comparison with all other First Civilisations) with its cities linked across vast regions and unified (variously) by trade and/or religion. Rulers have even been said to be priests or a theocracy. These interpretations are often presented as facts in books or articles for general consumption.
Evolution
Questions about the adaptation and gradual progression over time or evolution of culture in the ancient Indus Valley civilization.