

The Medes were the pre-eminent indo-iranian group for a bunch of the iron age.
They were integral to the grand alliance that finally brought down the Assyrian Empire, after similar alliances had formed and been defeated. The Median Empire took over huge chunks of the defeated empire and their name was so well known that even in the Persian Wars, the Greeks referred to joining the Persian Empire as Medizing.
Speaking of, one of the subordinate tribes in the Median Empire’s coalition was a minor regional player that today we call the Persians…







Tally systems and icons. It’s from these icons that writing emerges.
China might be the exception, writing maybe emerges from divination rather than accounting. But maybe it goes accounting > divination > writing.