Jeff Spock of Amplitude was interviewed by Wccftech about Humankind.
More information.
Thanks Farflame!CW - Essentially, we're all a hotbed of different inputs.
JS - Exactly! We absolutely are. We're like this DNA stew of everything that came before. We really wanted to make a game about our history that respected that. So this idea of having 10 cultures in six areas which mathematically is indeed one million potential play through possibilities. I think it's respectful of Earth history and Earth cultures, more than playing the Americans, being American, they're always Americans and always going to be Americans.
It's like "Yeah, but, I'm in the medieval era now in front of the Babylonians who were gone by now", that sort of thing. We'd like to get away from that kind of anachronism. If there is an anachronism, we like it to be purposefully chosen by the player. So, I chose the Romans in the classical era and I'm doing well enough and I want to gain more fame - which is our victory condition - so I'm going to push and be the Romans in the medieval era. If you're going to be out of step, it's voluntary. When you're the medieval era, you're going to look around see medieval cultures, not classical or Bronze Age cultures. So we have a nod to historical accuracy as far as the other cultures that appear at a period in the time of the game.
[...]
More information.