So it may have been the emergence of speech led to the dominance of our species

So it may have been the emergence of speech,not of language itself, that led to the dominance of our species.Language is so intimately tied to complex thought, perception, and motor functions that it difficult to untangle its biological origins.Some of the biggest mysteries remain:to what extent did language as a capacity shape humanity,and to what extent did humanity shape language?What came first, the vast number of possible scenarios we can envisage,or our ability to share them?