A phenomena that describes population growth in stages. Every country is at a single stage. Technological developments result in lower birth rates overall.
Process
Stage 1 - Early Death
A starting population will have poor living standards
Stage 2 - Explosive Growth
A population explosion due to technology causing fewer deaths
Stage 3 - Increase Slow Down
Fewer deaths causes fewer births later on
Stage 4 - Stable
Low birth and death rates
Stage 5 - Little Change
Yet to be seen yet