The article goes a lot into puzzling about the ancient past, but we have the last few centuries of descriptions of Europeans meeting hunter-gatherer bands. In virtually all encounters they lived peacefully. Where there was violence they were already agriculturists, or had European loggers who were trying to kill them.

I don't understand the discussion of psychopathy. The New York Times had an article about how Netanyahu had the Mossad head urge the Qataris to bankroll Hamas in mid and late 2023. Now both US political parties celebrate the destruction of all of Gaza's hospitals, the further invasions of Syria, Lebanon, Yemen etc. The killing and starvation of Gazan children. This is just normal American behavior. Look at Trump. The majority of Americans elected him because he is a reflection of what America is.