Group polarization is the tendency for a group to take a after deliberations and discussion.

Group polarization is the tendency for a group to take a more extreme stance than originally held after deliberations and discussion.

During the paleolithic, hominins grouped together in small societies such as bands, and subsisted by gathering  plants  and fishing, hunting or scavenging wild  animals. the paleolithic is characterized by the use of knapped stone tools, although at the time humans also used  wood  and bone tools.