The Human Population Demographic Transition Model

The Human Population: Demographic Transition Model The demographic transition model is a picture of population change over a period. In 1929 American demographer, Warren Thompson, observes the changes or shifts in birth and death rates in industrialized societies over a 200 year period. There are four stages of the Demographic Transition Model; Stage One (Pre-Modern) or High Flunctuating, up through the 18th Century and mostly agricultural, Crude Birth Rates (CBR) and Crude Birth Rates (CDR) are both high (30-50 per thousand). The population growth is slow and fluctuating. Infectious diseases and poor hygienic behaviors and not having clean drinking water mean few children nor adults can survive if there is little or no access to medicine. In Stage Two, Early Expanding, there is a rising population rate (CBR) increase and a (CDR) decline. High birth rates and low death rates mean life longer expectancy of a population resulting in population growth. It also means better sanitation conditions, better food quality and having the necessary medicine to combat illnesses. Transitioning to Stage Three, Late Expanding there is a decline in CDR and CBR. The population rises and birth rate fall. Living standards and income levels change for the better. Women have fewer children, become players in the workforce and seek higher educational levels along with their male counterparts. In Stage Four or Low Fluctuating , the human population stabilizes due to little CDR but moreShow MoreRelatedMexico s Demographic Transition : Public Policy And Spatial Process1618 Words   |  7 PagesBerry, B. J., Hall, L. S., Hernandez-Guerrero, R., Martin, P. H. (2000). Mà ©xico s demographic transition: Public policy and spatial process. Population and Environment, 21(4), 363- 383. 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