may be its inherit in the genes, Europe and in line US ( Australia: successful genocide of indigenous people) have a history of conflict among its population , but once they got a little stable they realized we should not fight amongst each other but plunder the other world ( may be I am looking at history incorrectly) but that is what its in a nutshell,

..post modernism is also destruction of meaning, and now we cannot agree on any thing ..

also affirmed by looking at this chart ( mapping of battles) https://battles.nodegoat.net/viewer.p/23/385/scenario/1/geo/fullscreen