During the Paleolithic, when two groups of humans met, did we fight and war, cooperate and trade, join together? | AskHistorians Archive Observer

During the Paleolithic, when two groups of humans met, did we fight and war, cooperate and trade, join together?

by Cannabis_is_Cool

As a follow-up, how did we communicate?

CommodoreCoCo

Though welcome here, you may find more people suited to answer this at r/AskAnthropology or r/Archaeology