We evolved from lower primates. I believe that less evolved primates is where language came to be in our evolutionary timelines. Check out the Gelada Baboon's social structures. They have a language that cannot be translated because it's not like our language, but it is communication through vocal chords. My point was that our ancient primate ancestors did fine without a complex language system. When I said "no spoken language" I meant no defined words like we use today.
Until primates write language, create libraries, schools, academies and invent science and technology they are primitives, surely. Language becomes the starting point of HISTORY! Maybe it isn't really an argument so much as an observation. Until and unless we employ specific VOCABULARY and Grammar in a societal "norm" progress cannot be made. Chimps don't write Shakespeare. But, neither do 99.99% of humans :)