Your answer here is the best one so far for me. Are chimpanzees some of those frequently raiding other groups (tribes) ?

Better education will always be a major part of the solution ... but i don't think education alone will be sufficient to make us good.

Like 99% of people you will (probably) disagree with me on the following, but eventually (in 50 years ?), i believe that many people will volunteer to have genetic therapy to decrease their aggressivity and that of their descendants.

We have to change in a fundamental way since we are still waging wars while climate change will likely kill a majority of us in the next few decades.

It's really not necessary to shame someone who is willing to learn.

Sources i give in the body of my post indicate an evolution of the knowledge since the BBC series of 1973 and also that even today archaeologist // historian disagree on this topic.

... if only I could find that source again ...
i believe they were explaining that there was an archaeological discovery where there was a village not so far away from the shore where they discoved huge piles of shells that showed that, for a very long time, there was a settlement connected to an other settlement near the shore and that for many thousands of years, there would have been people to stay near the shore bringing those shells to be eaten by people at the higher settlement further up, away from the cost and it was a proof (an example) of a stable settlement for tens of thousands of years so demonstating that, at the time, there was no war ...

i believe they were also saying (and this we now know it isn't true) that war was invented sometimes like 10,000 years ago, and mostly at the same time in many parts of the world. (Jericho's fortifications being the first example of large war)

i am quite sure it's not something I have invented because on some topics I have a good memory.