A new study about the evolution of language has some new stuff to say, I know, but I couldn't resist.
“What languages have in common is to be found at a much deeper level. They must emerge from more general cognitive capacities,” said Dunn.
What those capacities may be is a new frontier of investigation. As for Dunn, his team next plans to conduct similar analyses on other features of language, searching for further evolutionary differences or those deeper levels of universality.