The business, task or object of the scientific study of languages will if possible be 1) to trace the history of all known languages. Naturally this is possible only to a very limited extent and for very few languages.
It is only since linguistics has become more aware of its object of study, i.e. perceives the whole extent of it, that it is evident that this science can make a contribution to a range of studies that will be of interest to almost anyone.
Henceforth, language studies were no longer directed merely towards correcting grammar.
In the lives of individuals and societies, language is a factor of greater importance than any other. For the study of language to remain solely the business of a handful of specialists would be a quite unacceptable state of affairs.