ABSTRACT
The various languages and dialects of the world arose out of the different experiences and the different modes of expression of separate human groups. The anthropologists cannot decide from the evidence which is available whether there was one original human stock from which all races and tribes are descended or several original stocks. If all men came from one stock, it must have happened that, after the descendants of the first parents became separated through migrations, they gradually changed their modes of articulation, enlarged the number of their ideas, and adopted new words until the language of each group of migrants was unintelligible to the other groups. If there were several original stocks, their languages would naturally have differed from one another in sounds and structure because of their different origins. The history of language would in either case be one of differentiation into many tongues.
