1 / 12

Population Theories

Population Theories. Theory of Demographic Transition. Demographic Transition-The phenomenon of population changes in a country over time. Stage 1 Pre-Transition. High, stable birth rate High, fluctuating death rate No natural increase Rural/Agricultural society

lorettagordon
Download Presentation

Population Theories

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Population Theories

  2. Theory of Demographic Transition • Demographic Transition-The phenomenon of population changes in a country over time

  3. Stage 1 Pre-Transition • High, stable birth rate • High, fluctuating death rate • No natural increase • Rural/Agricultural society • No countries in the world are at this stage

  4. Stage 2-Early Transition • High birth rate • Falling death rate-“Germ Theory of Disease Control” • Large natural increase • Rural/Agricultural society

  5. Stage 3-Late Transition • Falling birth rate (birth control) • Low death rate • Decreasing natural increase • Urban/Manufacturing society

  6. Stage 4-Post Transition • Low birth rate • Low death rate • No natural increase • Urban/Service sector based society

  7. Stage 5?? Post-Post Transition? • Death rate>Birth rate= Natural Decrease

  8. Pessimistic Views-Thomas Malthus (1766-1834) • Political economist who recorded concerns about changes occurring in Europe in the early nineteenth century • -Europe at the time was entering a period of rapid industrialization, but also very rapid population growth. • -According to Malthus, the population appeared to be growing in a geometric sequence (1,2,4,8,16…)- too quickly for the food supply which could only increase arithmetically (1,2,3,4…) .He felt that population, if uncontrolled, would be "checked" by certain things: • "Positive" Checks • 1. Disease-"The Black Death" • 2. War-Napoleon, Crusades... • 3. Famine-India • "Negative" Checks • -predicted that mankind would consciously prevent births through: • 1. Choice • 2. Delayed marriage

  9. Present Day "Positive" Checks • 1. Aids, Ebola • 2. Africa’s situation (Life expectancy-38 years) • Malthus could never have predicted: • -Global access to medicine, water, food • -Widespread birth control • -Global awareness • -Fear of nuclear destruction

  10. William Catton • Introduced the concept of the earth’s carrying capacity • He suggests that the earth has been exceeding its carrying capacity for many years; this has been possible because we have been using up non-renewable resources that future generations will need • This is known as a “phantom carrying capacity”-while allowing a higher population, is ultimately non-sustainable and the economic and ecological systems will collapse

  11. Optimistic Views • Cornucopians-have faith in the human ability to find technological innovations that will increase the earth’s carrying capacity • D.J. Bogue-Theory of Demographic Regulation-over an extended period of time, a society naturally limits its population. The population will grow only in response to the Earth’s ability to support it.

  12. Population Cartogram

More Related