Demography

Demography

study of human populations and how they change

What does demography reflect?

life history tradeoffs

Stage 1

-high mortality

-high birthrates

-favors fast life history strategy

-stable or slowly increasing population change

Stage 2

-high birth rate

-death rate falling rapidly

-population rapidly increasing

-fast life history still favored but moving towards slow

Stage 3

-falling birth rate

-death rate falling slowly

-population increase slows down

-transition from fast to slow life history

Stage 4

-low birth rate

-low death rate

-population is falling then stable

-slow life history

Stage 5

-future of population is determined by fertility rates

-low death rate

-little change in population

-uncertain of what will happen as few societies have reached this point