What contributed to the resettlement of ancient people on earth?

There are two main reasons why primitive people (the so-called “homo sapiens”) began to explore new lands and move. The first is the search for food, gradually, with the increase in the number of people, the hunting areas increased and people went to look for edible plants, berries, roots in new territories. The second reason is climate change, people tried to escape from severe weather conditions. And since the water level in the world’s oceans was then lower, they could travel from one continent to another.