Then you have learned nothing. The tribalism in humans is hardwired. It's not going away, whatever we may wish or do. The media doesn't create the divisions, they just profit from them.
The key to peaceful coexistence is properly delineated regions and nations, so that each thede can have their land without being afraid of being invaded and replaced.
1) It's also political differences in the same nation. Tribes fragment to smaller tribes, small tribes merge to large tribes etc.
2) There are divisions based on topics of interest, subcultures, etc. that aren't location-based, but thanks to telecommunications, global.
When boundaries can change slowly enough we don't even notice. That's organic growth, that's ok.
> that aren't location-based, but thanks to telecommunications, global.
Thankfully I only have to close the browser tab to forget about someone Who is Wrong On The Internet. But I can't do that in meatspace.
Some may call this naive, but this is the reason we need more unity in the world. Less division. More us...less us and them. The media seems to do a great job of pitting one side against the other. I think many of our attitudes and perspectives are learned and perpetuated by the media.