If you don't know the basic outline of our violent history,…
If you don't know the basic outline of our violent history, I would advise you as a friend that you start reading more.
At a minimum watch a few documentaries from the world wars & big historic events. Some movies like Schindler's List are good as well.
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Who is "our"?
As Napoleon said... the victors write the history books.
Human.
Ah. 'tis also present and future in that case. Competition for scarce resources is real.