Since the birth of mankind, at least10 billion people have lived together on the earth. In fact, this is also a rough estimate, but there have been many people on the earth, regardless of race or ethnic group, but it is these human beings who make up the earth, and the history of mankind is endless.

In ancient times, due to the imperfection of medical technology and various aspects, not many people were able to survive and produce. At that time, the number of human beings remained at a relatively stable stage, and the number of human beings in each country was relatively small. So at that stage, the total number of human beings on the whole earth may not exceed several hundred million, which is due to the limitations of environment and technology at that time. Up to now, due to the change of human pursuit, for a long time, human beings began to give birth without restraint, so a large number of people appeared on the earth. At that time, the population on the earth was very large, so the period with the largest population on the earth was the 1970s and 1980s. People haven't understood the meaning of environmental carrying capacity, so they only know to breed without restriction. At that stage, the number of human beings also broke the record. Now, because all countries have fallen into the aging population, the population is still very large, but it is gradually decreasing. Many people are old people, but there are fewer and fewer freshmen, so the population growth has entered a stagnant period. After the earth has gone through several stages, the population of each stage is actually different, but it will add up to at least10 billion people. And this is a rough estimate. After all, some areas are relatively developed, so their population prediction and calculation are more accurate, and some areas are relatively backward in economy, so their population calculation will be more negligent. But in the final analysis, the earth has carried a very large population for so many years.