For one I once read that a lot of the cannibalism stuff was unfounded, digging deeper it seems a lot of it is founded, to the point that some may still practice it today, hunter-gatherers, translators may lie about that but I think its safe to say it happened, along with all that other horrible stuff, along with greater evils then we would want to imagine.
Violencee is cross cultural as well, what does this suggest to me? That humans had a complex environment where they needed to work with some humans, and obvious fear and war with other humans, not to mention the kind of competition that goes on within the ‘cooperation’ side, isn’t always ‘cooperation’ like we would imagine, and may expload into insane violence.
What does this say to me? The obvious, that humans are filled with adaptations, some for empathy, some for hatred, some for violence, some for peace, depending on circumstance and environment different innate qualities interacting with the environment create a ‘manifest psychology’ (the result of our adaptations and environment interacting).
We have an insane adaptive flexibility, so under situations we can essentially be mindlessly cruel apes, but in other circumstances we can be otherwise, and i’m saying that modern environments give us more chances to not be that cruel ape, reasons why we don’t need to be that way today and how attempting to control ourselves now may be better, because, our emotions, our mental evolution, our mental architecture, is not ‘designed’ to operate efficiently in modern societies, our brains may be more adapted to an ancestoral past, but that doesn’t mean we’d want to go back there, that our societies today aren’t more preferable, and to live well in these societies to attempt at least, to control our adaptations from ruling us where it might be no longer beneficial for the individual organism to allow them to do that.