Ice Age Humans (30,000 Years Ago)

Starting about 35,000 years ago, humans seem to have made a great leap forward culturally. The authors argue that this wasn’t because of genetic changes that caused the human brain to have increased capacity. It was because some groups culturally evolved the “social tools” that allowed them to maintain connections and share information over long distances. The groups with the most effective social tools managed to stay connected and to survive, and their descendants inherited this culture of connectedness. It’s likely that forming greater connectedness and more complex culture was necessary in order to survive the periods of high climate variability that were a feature of the last ice age.