Language requires investigation within a broad framework, which can only be achieved if the elements studied belong to all realms of verbal (and to some extent non-verbal) communication. Grammar is merely the systematized aspect of language: by drawing on data from oral communication in a number of languages - with its phonological, pragmatic and gestural aspects - and taking into account palaeontology, anthropology, psychology and evolutionary biology, it is possible to shed new light on the phenomenon of language, meant and designed for communication, and not merely grammar.

This...