Tribe. Such a double-edged sword. To be in? Warmth. Security. Companionship. To be out? It is by no means coincident that we say “out in the cold” when someone is rejected by the tribe. Tribal cooperation and alliances? Productive. Peace building. Tribal warfare? Brutal. Deadly. Destructive. How do the tribes we cherish define who is in and who is out? How do our tribes define and maintain their boundaries? Advent is a good time to think about it.