No ... you've only got to look at the history of the World to see that they fuck each other over: the First World War was a(nother) dispute amongst uncles/aunts/cousins/whatever and pretty much all of European history has been disputes between parents/children/siblings/aunts/uncles/cousins.

I get the impression it was much the same in China, Japan and other places too.

They fuck us over, bu they fuck each other over too ... just at our expense rather than their own (we're the ones who die, not them).