Navajos have been using a peacemaking system to resolve conflicts long before contact with Europeans. Built upon K’e, the fundamental idea is to restore relationships and harmony, rather than to assign guilt and punishment, through the use of four foundational values: Respect, Relationship (K’e), Responsibility, and Reverence. Mark Sorensen joined the Navajos as a Phd. student and stayed on for 40 years, teaching school and working to keep this peacemaking system alive in his young Navajo students, teaching them the seven steps to peace developed with Navajo Thomas Walker. He writes about it in detail here.