" The anthropologist Claude Lévi-Strauss once observed that, “for the majority of the human species, and for tens of thousands of years, the idea that humanity includes every human being on the face of the earth does not exist at all. The designation stops at the border of each tribe, or linguistic group, sometimes even at the edge of a village. "

― Patrick Radden Keefe , Say Nothing: A True Story of Murder and Memory in Northern Ireland