This is certainly well-meant in terms of scientific scepticism. An illusion, because we always use grand theories. A grand theory. To present them here is not possible.
All cultural norms are an abstraction of architecture that existed before man.
There is still considerable terminological confusion in all those various fields of ethnology and cultural anthropology that deal with dual concepts. Depending on schools or background, terms vary considerably. Nobody denies however that dual concepts are of essential significance in the traditional societies surveyed. Conventionally such phenomena are either described in terms of social anthropology, interpreted in a structuralistic context, or explained in terms provided by the history of religions, such as creed, myth, cosmological ideas etc. Each judgement excludes the other.