IA - Cases of evolution

The human being is something extraordinary. So far, we're all in agreement. But what exactly is it that is special about Homo sapiens, what is it that makes it unique among other animals, especially apes, and when did our ancestors acquire that something?
Over the past century, numerous theories have emerged, some of which tell us more about the era in which their postulants lived than about human evolution.
The manufacture of tools is what makes human beings unique,” wrote anthropologist Kenneth Oakley in an article from 1944. Apes use objects that they find as tools, he explains, “but the first characteristically human activity was modeling sticks and stones for a specific use.