Global demography before

How has global population changed over time?
The one-billion mark wasn't broken until the early 1800s.
It was only a century ago that there were 2 billion people.
Since then, the global population has quadrupled to eight billion.
Around 108 billion people have ever lived on our planet..
What are the demographic changes?
Demographic change describes the changes in population size and structure caused by changes in birth rates, death rates, and by migration..
What is the global population over time?
It was only a century ago that there were 2 billion people.
Since then, the global population has quadrupled to eight billion.
Around 108 billion people have ever lived on our planet.
This means that today's population size makes up 6.5% of the total number of people ever born..
When did the demographic transition start?
The global demographic transition began in the nineteenth century in the now economically developed parts of the world (the North) with declines in death rates.
Large reductions in birth rates followed in the early part of the twentieth century..
The roots of statistical demography may be found in the work of the Englishman John Graunt; his work Natural and Political Observations . . .
Made upon the Bills of Mortality (1662) examines the weekly records of deaths and baptisms (the “bills of mortality”) dating back to the end of the 16th century.
While basic demographic studies, such as censuses, were conducted in the ancient world as far back as 6,000 years ago, demographers as we know them, such as John Graunt from the United Kingdom, came about in the 16th century.

In the meantime, demographic change has created a 'bulge' generation, which today appears in many countries as a large working-age population. This cohort will

In the past 50 years, the world accelerated its transition out of long-term demographic stability. As infant and child mortality rates fell, populations began

What are the demographic drivers of population growth?

The demographic drivers of this growth are high fertility in parts of the South, as well as declining mortality and momentum

This large expansion in human numbers and of the accompanying changes in the age structure will have multiple consequences for society, the economy and the environment as discussed in the subsequent chapters in this issue

When did the global demographic transition begin?

Adapted from United Nations (2007)

The global demographic transition began in the nineteenth century in the now economically developed parts of the world (the North) with declines in death rates

Large reductions in birth rates followed in the early part of the twentieth century

These transitions are now more or less complete

Categories

Global demography before

How has global population changed over time?

What are the demographic changes?

What is the global population over time?

When did the demographic transition start?

What are the demographic drivers of population growth?

When did the global demographic transition begin?