Trifunctionalism is a theory by Georges Dumézil on early Indo-European societies, arguing that there were three different groups with three different functions, reflected also in aspects such as Indo-European religion.
- Sovereignty function - Rulers, priests, and legal specialists. Further divided into two aspects, magical.and juridical, corresponding to different gods, contrasting and complementing one another. In Norse mythology, corresponding to Odin and Tyr.
- War function - Warriors. Less intellectual but physically strong gods. In Norse mythology, corresponding to Thor.
- Generative function - Farmers, herders, and healers. Gods associated with fertility, abundance, healing, and peace. In Norse mythology, corresponding to Freyr.
Another example is the Indian caste system, with additions for conquered groups.