Tribes. You May Have Found the Essay, If Not, Do!
Bill Whittle of Eject! Eject! Eject! has a well thought out article the discusses “tribes.” His logic, as usual, is exceptional. Part of his message that is so powerful is that tribal behaviors are not related to cultural things, but the attitudes we have today are the identifying factor in tribalism.
Read and be stretched in your own thinking about our human condition.