Population transition from traditional to modern birth rate mortality rate change

Traditional: high birth rate, high death rate and low natural growth rate

Modern: low birth rate, low death rate and very low natural growth rate

Reason: The traditional type exists in agricultural societies based on manual labor, which need to have more children to help with agricultural production, but with poorer health care

There is also a transitional type between the traditional and modern types, which is formed by the industrial revolution, which led to a great development of productivity. There is also a transitional type between the traditional and modern types, that is, the industrial revolution led to a major development of productive forces, people's quality of life improved, health care and health care and the formation of progress

The modern type is affected by the concept of life, people tend to marry later and have children later, or even do not have children, and medical conditions are further improved

Therefore, the population transition from the traditional type to the modern type, the birth rate should be a decline, the death rate should also be declining. The death rate should also be declining.

From the book for you to pick up a copy of that modern society you do not understand that aspect you can take China as an example the more developed place his natural growth rate the lower you can imagine it ~ China is not the implementation of late marriage and late childbearing policy in modern society, there are a lot of Tinker families (that is, do not want to have a child) and each family a child birth rate is this way .... The death rate The number of people who die each year is within a certain range, but the improvement of human quality and policy The births do not make up for the deaths, so the rate of natural increase is lower than 1