What your original comment suggested was not that you acknowledged the human capacity for violence, which nobody can deny and I am not debating.
The comment implied - and this is an assumption so ingrained in our western society that nobody could blame you for it - that the only thing separating humans from violent, animalistic, or selfish impulses is societal structure and policing.
our institutions are our attempt to crawl out of the jungle
That just isn’t demonstrable, as much as it may feel intuitive. It’s a Hobbian philosophy.
I’m not here to pretend I can convince you otherwise in one comment thread, took me a long time to change my mind on that and I’m not anthropological authority. That’s why I recommend the book, it’s quite eye-opening. At least it was for me.