You know, this thread reminded me of something interesting.
I've been playing a lot of Stellaris recently, a game where you direct a spacefaringempire into expansion across the stars, exploration of the universe, warfare, and so on.
You know what's fascinating about playing a 23rd-century spacefaring human empire in that game? The population and leaders of this empire can be white, black, Asian, Latino, coloured, etc.. They also have European, Asian, and African names.
And nobody bats an eye at it. In fact, what's remarkable about it is that nobody is commenting on this inside the game. The game just tells you "Yeah, humans are diverse. Even centuries into the future. Deal with it."
Of course the game doesn't simulate humanity having different cultures within its population (except a bare bones factions systems). You can also change the names of your leaders -- but not their portraits.
But with just a bit of effort at diversity using names and in-games portraits, it reminds us that humanity is diverse and will be diverse for a long time to come. It doesn't need to justify why black or Asian people exist in its setting -- humanity exists in it, thus they do as well. End of discussion.
And I really like that about it.