Who were the progressives and why did they believe caused social problems

The progressives were a group of people who reached for new and liberal ideas. They wished for things to change like the way they were. 

They believed that industrialization and urbanization caused many social problems. 

Hope this helps :)

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.