GROUP 1

Global Demography

  • Presented by Group 1

Demography

  • Definition: Statistical study of human populations, examining size, composition, and changes due to fertility, mortality, and migration.

Key Terms

  • Key terms to understand in demography include:

    • Birth Rate

    • Life Expectancy at Birth

    • Fertility Rate

    • Median Age

    • Mortality Rate

    • Immigration and Emigration

    • Age Dependency Ratio

Birth Rate

  • Definition: Number of individuals born in a population during a specific time period.

  • Example: If there are 35 births per year per 1000 individuals, then the birth rate = 35.

Life Expectancy at Birth

  • Definition: Average years a person of a specific age can expect to live, based on the current mortality pattern in a country.

Fertility Rate

  • Definition: Total number of children a woman can bear during her childbearing years (ages 15 to 45).

  • Historical Data: Changes over time (1950-2015) indicate trends.

Median Age

  • Definition: Age that divides a population into two equal groups—half younger, half older.

  • Global Median Age: 21.7 in 1970; 30 in 2019.

Mortality Rate

  • Definition: The percentage of individuals who die relative to the total population annually.

  • Formula: Death Rate = (Total Deaths/Total Population) x 1000.

Immigration and Emigration

  • Immigration: Act of entering a foreign country, often for permanent residency.

  • Emigration: Act of leaving one's own country to settle permanently in another.

Age Dependency Ratio

  • Definition: Compares the number of dependents (young and elderly) to the working-age population (ages 15-64).

  • Expressed as the ratio of dependents per 100 working-age individuals.

Challenge Questions

  • Considerations:

    • Implications of long life spans on population growth.

    • Population fluctuations related to carrying capacity.

Malthusian Theory

  • Concept: Population growth may exceed resource availability if unchecked.

  • Developed by: Thomas Robert Malthus.

  • Key Points:

    • Population grows geometrically, while resources increase arithmetically.

    • Preventative and positive checks can help manage population growth against food supply shortages.

Population and Food Supply

  • Growth Patterns: Population increases vastly due to geometric progression while food supply grows at an arithmetic rate, leading to potential shortages.

  • Arithmetic progression example: Sequence 2, 4, 6, 8, 10 (constant difference).

Population Control

  • Corrections to population growth include:

    • Positive Checks: Natural disasters, wars, famines.

    • Preventative Checks: Celibacy, late marriage, family planning strategies.

Malthusian Trap

  • Concept: Technological advancement in food production can lead to increased population, which might outstrip available resources, leading to shortages and crises.

Demographic Transition Theory

  • Overview: Describes changes in birth and death rates affecting population growth as a country develops economically.

Stages of Demographic Transition

  • 1st Stage: Pre-Modern Society

    • Characteristics: High birth and death rates, low population density, low productivity, low life expectancy, limited literacy, and technological advancement.

  • 2nd Stage: Urbanizing/Industrializing Society

    • Characteristics: Rapid decline in death rates due to improvements in food supply and sanitation.

  • 3rd Stage: Mature Industrial Society

    • Characteristics: Declining birth rates due to better access to contraception, increased wages, and women's education.

  • 4th Stage: Post-Industrial Society

    • Characteristics: Low birth and death rates, stabilized or slowly growing population, high urbanization, high literacy, and labor specialization.

Impacts on Global Population

  • Considerations of both positive outcomes and risks related to population dynamics.

The Good News

  • Positive outcomes include:

    • Better economy.

    • Efficient resource utilization.

    • Advancements in medical, agricultural, and industrial sectors.

    • Enhanced labor force and capital investment.

The "Perils" of Overpopulation

  • Challenges faced:

    • Food shortages.

    • Environmental issues.

    • Unemployment.

    • Poverty and low living standards.

    • Inflation.

    • Conflicts and wars.