Navajo Courts and Navajo Common LawThe Navajo Nation court system is the largest and most established tribal legal system in the world. Since the landmark 1959 U. S. Supreme Court decision in Williams v. Lee that affirmed tribal court authority over reservation based claims, the Navajo Nation has been at the vanguard of a far reaching, transformative jurisprudential movement among Indian tribes in North America and indigenous peoples around the world to retrieve and use traditional