Two other highly influential, nonreductionist theories of myth come from the fields of anthropology and psychology (see Anthropological Theory and Criticism). The French anthropologist Claude Lévi-Strauss, whose extensive work with South American tribal societies has yielded extraordinary analyses, argues that the meaning of myths lies not in their manifest content but rather in their underlying structure of relations, which typically works to mediate between polar extremes (raw and cooked, agriculture and warfare, life and death). In other words, the purpose of myth is to provide a logical model capable of overcoming a contradiction. Ultimately this leads Lévi-Strauss to the notion that the structure of myths is identical with that of the human mind. Thus the mythopoeic (mythmaking) imagination, its structure and operations, is reflected in the structure and symbols of actual myths.