Why is the population of the United States always 300 million?

The population of the United States has been 300 million for the following reasons:

Unlike China, the United States has a small population base. Even if there are a large number of immigrants every year, it is difficult to change the total population of the United States to a great extent. Western countries are different from our country. Traditional China pays attention to "more children and more happiness" or "raising children for old age", so many children will be born.

But America is different. Their medical facilities and people's livelihood guarantee that they can live a stable life even without having children. So many Americans are reluctant to have children. Even if some policies are introduced to encourage children, it is difficult to change this situation. The low fertility rate will offset the mortality rate, so the population growth will naturally slow down.

The number of immigrants in the United States is controlled, which does not mean that you can succeed as long as you want to immigrate. You must meet their requirements before you can immigrate. In addition, some American citizens will emigrate to other countries, such as Europe and Asia. This is a normal thing, so the population of the United States will continue to grow at this slow rate for a long time to come.

However, the population of the United States still ranks third in the world, the first is China, and the second is India, and in the next few years, India is likely to surpass China to become the most populous country in the world. However, this is not a good thing. Limited resources will be shared by more people, which will only bring greater pressure to India with low living standards.