Boris Gudenuf
Deity
To this I think we need to consider that trade between the Indus Valley and Middle East were chiefly by proxy (trade networks).
Spoiler from https://en.wikipedia.org/wiki/Indus_Valley_Civilisation#Trade_and_transportation :There was an extensive maritime trade network operating between the Harappan and Mesopotamian civilisations as early as the middle Harappan Phase, with much commerce being handled by "middlemen merchants from Dilmun" (modern Bahrain and Failaka located in the Persian Gulf).[140]
ALL long-distance Trade in Ancient to Renaissance Eras was by proxy. That's how the Sogdians made a good living out of the Silk Road network: they were nomads who acted as 'middle men' between China, India, and the Middle East, just as the Kushans had done before them. The individuals that traveled long distance over the trade routes were so few we remember them by name: Zhang Qian, Marco Polo, Hippalus.
Of course the indo-european Romans would adopt elements of Han or Mauryan cultures if they were next door - that would be an invitation for conquest. https://en.wikipedia.org/wiki/Interpretatio_graeca
Not true. As an example I just read up on, Buddhism was spread along the Silk Road network from India to China, where it flourished because Taoism, a purely Chinese mindset, was similar to Buddhism in its view of the world and man's place in it. On the other hand, Buddhism never spread west, into Persia, the Middle East or Europe, because their religious mindset was of Opposing Factions of Gods or God-like critters with people as auxiliaries of them. Compared to the Endless cycle without even named Gods of Buddhism, the thought process was just too alien.
Comparatively, the cult of Mithra spread easily from Persia into the Roman Empire, because the two mindsets were so similar: a Hero God with attributes you can admire and emulate (originally , in Zoroastrianism, Mithra was the minor God of Contracts and Truth-Telling: bth aspects that appealed to men who aspired to the 'my word is my bond' title and merchants who have to rely on a degree of honesty to deal at all)
There's a reason why, right down to the 19th and early 20t centuries, the Chinese were 'inscrutable Orientals' in the popular European view, and the term "East is East, and West is West, and never the twain shall meet" is one of Kipling's most-remembered lines: it felt right to European readers - and Indian or Chinese readers, had they access to a translation.
Yes, I think such concept would better fit in civ6, where we all rule empires from a similar seat like Sauron in Mordor - citizens are obeying minions we've created.
Actually, I think a humankind concept is missing in Civ and yet I've not seen much of it in the preview of this game. It's closer to a Civ ripoff than actually showing any humankind aspect.
I would like to argue that point, but I don't think we have enough information to make any intelligent statements about it: like the blind men and the elephant, whatever we say will say more about what we want and hope to see and in all likelihood be only a small part of what they are actually designing and planning to market.
I have argued that looking at their earlier games, like Endless Space 2 and Endless Legend should tell us something about Humankind, but that's not necessarily true: presumably, had they planned a Historical Version of either of the 'Endless' games, it would have been tagged Endless Empires or Endless Humanity or Endless History (which last, however, sounds downright Buddhist!)