Evolution

Although all of the stages of evolution are crucial, I think that Homo Ergaster is the most important stage. Their bodies adjusted to the environment by sweating instead of panting, and the white in their eyes allowed for better communication. A larger brain also allowed Homo Ergaster to see their world different than other species. They could see foot prints and know where an animal was headed, or they could understand what the weather would be like based off of the clouds. These new ways of thinking and interpreting the world around them helped them evolve further, and eventually into the humans we are today.