About the origin of mankind

According to Darwin's theory of biological evolution, human beings are the product of biological evolution, and modern humans and modern apes have the same ancestor. According to the fossil data of ancient apes and ancient humans, the earliest humans may have appeared 3 million or 4 million years ago. The process of human origin can be divided into three stages: ape-man stage, tool-making stage, and the latter stage includes ape-man and homo sapiens; They are divided into early stage and late stage. 1859, the British biologist C. R. Darwin published the book "The Origin of Species", which clarified the development law of biology from low to high and from simple to complex. 187 1 year, he published the book "the origin and sexual selection of human beings", listing many evidences that human beings evolved from extinct apes. But he didn't realize the essential difference between humans and animals, and he didn't correctly explain how apes evolved into adults. Engels put forward the scientific theory that labor creates human beings. 1876, he wrote the article "the role of labor in the transformation from apes to humans", pointing out that the fundamental reason for human beings to leave the animal state is labor, and the essential difference between human beings and animals is also labor. This paper discusses the transformation process from apes to humans: at first, apes lived in tropical and subtropical forests in groups, then some apes went down to the ground to look for food, gradually learned to walk upright on two feet, liberated their forelimbs, used tools such as stones or sticks, and finally developed into making tools by hand. At the same time, physique, including the brain, has also developed accordingly, and various characteristics of human beings have emerged. Engels called the ancient apes living in trees "tree-climbing apes", the creatures in the transition period from apes to humans as "people in formation" and the people who can make tools as "fully formed people". With the continuous discovery of fossil materials and the continuous improvement of dating methods, people's understanding of the origin of human beings has also deepened. Although there are still many problems, we can outline the clues of human origin and development. Introduction to the theory of biological evolution;