What is the difference between a skilled person and a homo erectus?

A skilled man has not yet walked upright like a homo erectus. We can say that with the course of evolution, man was able to learn to walk upright. Homo sapiens arose on earth about 3-2.5 million years ago, and Homo erectus about 2 million years ago. That is, we can say that it took about 800 thousand years for a person to be able to evolve and learn to walk upright. So gradually, in the course of evolution, a primitive individual turned into an intelligent creature.