This title does a couple things that irk me.. It seems to lay at our feet that tribalism is something automatically negative and that it is somehow our greatest obstacle... as though the training wheels that we've used throughout history and evolution are somehow the only thing holding us back from solving all of our problems. Tribalism, if you like, is a kind of team-work. Our greatest danger, i would say, is our tendency to believe anything that is palatable and upholds what we already believe.