@pezen: The trailer made it seem like the game was set waaay in the future. That knowledge simply could have been lost to history, at least to the tribe the protag belongs to. I wouldn't be surprised if discovering the truth of the past ended up being a major plot point.
This game seems like the worst design choices in every direction which sucks because I was so excited for it. Shit happens way too slow to enable active play but fast enough so that the constant need the check back feels more like an annoying chore than a game.