1. Key Issue 4: Why might the world face an overpopulation problem?

2. 9. Malthus theory, neo- malthusians

3. Thomas Malthus on Population
Pessimist
population would outrun food supply
decrease in food per person.
Assumptions
Populations grow exponentially.
Food supply grows arithmetically.
Food shortages and chaos inevitable.

4. Ester Boserup on population
Optimist.
“Necessity is the mother of invention.”
Many people, but we will meet the challenge because we have to.
More people=more minds=more innovation.
Opposite of Malthus

5. Malthus: Mid 1700’s Boserup: Mid 1900’s Malthus vs. Boserup
Think: Why do the dates make a difference in their theories of population?

6. TECHNOLOGY!!!!
Although, today there are “Neo-Malthusians” who agree with Malthus. They believe that technology can only do so much and that the people who need it, don’t have access to it.

7. Neo-Malthusians Maybe Malthus WAS on to something…
Food not only resource strained by population growth
Population has outpaced economic growth
Sometimes technology does more hurt than good
Green Revolution
Lack of resources leads to violence and conflict

8. Population J-Curve: represents exponential growth Exponential: growth whose rate becomes ever more rapid in proportion to the growing total number or size.

9. Population and Resource Consumption

10. 10. Epidemiologic stage 1 11. Stage 2 12. Stage 3 13. Stage 4 14
10. Epidemiologic stage Stage Stage Stage Stage 5?

11. Epidemiologic Transition
Stages 1 and 2
Infectious and parasitic disease.
“natural checks” according to Malthus
Stages 3 and 4
Degenerative and human created disease.
Increase in chronic disorders associated with aging (heart attack, etc)
Possible Stage 5
Reemergence of infectious and parasitic disease.

12. The End (Look at stats on main page and then look at parts of the comic (pg. 2 and 3)