Structural anthropology is a school of sociocultural anthropology based on Claude Lévi-Strauss' 1949 idea that immutable deep structures exist in all cultures, and consequently, that all cultural practices have homologous counterparts in other cultures, essentially that all cultures are equatable.
Lévi-Strauss' approach arose in large part from dialectics expounded on by Marx and Hegel, though dialectics (as a concept) dates back to Ancient Greek philosophy. Hegel explains that every situation presents two opposing things and their resolution; Fichte had termed these "thesis, antithesis, and synthesis." Lévi-Strauss argued that cultures also have this structure. He showed, for example, how opposing ideas would fight and were resolved to establish the rules of marriage, mythology and ritual. This approach, he felt, made for fresh new ideas. He stated: