Wow, that’s actually really interesting. I knew of other empires in this shape (to me the Kushan empire is the most obvious syncretic example) but I didn’t know they were all shaped this way. I suppose I always imagined empire being a bigger thing than kingdom but this definition seems more useful. It seems that other definitions don’t involve resource extraction necessarily but power over multiple nations. Still, it’s a useful frame.
In practice I suppose this must have been the case because you can’t easily impose monocultures especially when information travels slowly.
That makes me curious if military tactics of the time also had regional variation and if the relative strengths of various regions came from their awareness of certain tools being effective. Bringing in a foreign army with its foreign techniques might have been like bringing small pox to a population- they’d have no defense the first time around so if you’re fast you get them all.
Altogether an enjoyable read. Thanks.