the words ‘fair’ and ‘fairness’ appear only in the languages of northwest Europe

—“despite their roots in Proto-Indo-European, the words ‘fair’ and ‘fairness’ appear only in the languages of northwest Europe where they originally referred only to behavior within the tribe. This is clearly a marker for the importance of moral reputation within the group, and it suggests selection for these traits in the northwest of Europe but not elsewhere throughout the extensive areas conquered by the Indo-Europeans.”—