Can someone paraphrase this for me? over all they ( the aztecs and cortes) were both ruthless killers for money, land, and power.

The Aztecs and Cortes were ruthless killers. (for multiple reasons)

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.