The document discusses indigenous governance systems in the Philippines. It defines who indigenous peoples are according to Philippine law and notes their concentration in Northern Luzon and Mindanao. It then examines aspects of indigenous governance like sources of authority, decision-making processes, and justice systems. Specific examples of traditional leadership structures are provided for groups like the Ibanag, Ivatan, Gaddang, Bago, and Ikalahan in Northern Luzon, who typically had councils of elders and leaders chosen based on qualities like intelligence and integrity rather than inheritance.