Why is knowledge about primitive man needed in the modern world?

Any historical data is needed for a correct understanding of modern events. Information about primitive man includes not only knowledge about the first evolved primate, digging stick and stone chopper. In those days, the first beliefs were born. Humans have gone through a period of mass extinction. People migrated en masse. Based on the settlement of people and animals, scientists have put forward a hypothesis about the existence of a land connection between Eurasia and North America. And she was confirmed. Scientists have found that such a transition was possible due to glaciation. And this speaks of the climate of that time. Obviously, a lot of information of a different nature was obtained from one fact of migration. It is known that the periods of glaciation are repeated cyclically. And this will already help predict the next period in the future. And there are many such examples.