What was man like when he stood out from nature? Thanks to what was the person able to survive?

What was man like when he stood out from nature? Thanks to what was the person able to survive? How did this affect him and the world around him?

Standing out from nature more than two million years ago, our ancestor was small in stature – about one and a half meters. His gait was not only slow, but also uncertain, since there was no cerebellum that coordinates the movements, and this creature often had to lean on his hands.
Nature was not so merciless to people: she gave them a truly unique thing. This is an amazing human brain. Of course, other living things also have a brain, but the human brain is more adapted to solve complex problems posed by nature.
The brain of a primitive man was designed in such a way that he could transmit information using various sounds. He developed a willingness to understand words. It also made it possible to make the first inventions of mankind – tools of labor, which helped the development of labor activity.