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Journal Article
World Population: What Helps Explain the Explosion?
A steep decline in India’s death rate from 1950 to 2019 substantially affected the size of the global population and reduced that nation’s median age relative to the U.S.
What Has Been Driving World Population Growth?
The world’s population more than doubled from 1960 to 2021 despite the birth rate falling. Declining death rates in lower-income countries drove the growth.
Journal Article
The Association Between Poverty and Mortality
The world’s population is increasing mostly in poor countries as a result of both reduced mortality and relatively high fertility.
The End of Rapid Population Growth
The world’s population had been doubling every 47 years to reach 8 billion today. But it is expected to peak at 10.5 billion before declining by century’s end.