Population crash

Population crash is a drastic reduction in population, sometimes due to population overshoot, such as is theorized to have occurred in Homo sapiens around the year 1500 at Easter Island.

In 2015, population crashes in mosquitoes were demonstrated using "gene drives" via CRISPR technology.

## Contents

* 1 Sub-replacement fertility
* 1.1 Film documentary Demographic Winter: The decline of the human family
* 1.2 Eric Kaufmann on sub-replacement fertility
* 2 See also
* 3 External links
* 4 Notes

## Sub-replacement fertility[edit]

Replacement fertility is the level of fertility that is required to sustain a population without any external inputs.

In human populations, replacement fertility is 2.1 children born per woman in a given population.

### Film documentary Demographic Winter: The decline of the human family[edit]

The film Demographic Winter focuses on the issue of sub-replacement fertility.

A review of the film documentary Demographic Winter declares:

“  |  One of the most ominous events of modern history is quietly unfolding. Social scientists and economists agree -- we are headed toward a demographic winter which threatens to have catastrophic social and economic consequences. The effects will be severe and long lasting and are already becoming manifest in much of Europe. This ground breaking film draws upon experts from many different disciplines and reveals in chilling soberness the dangers facing society and the world's economies...[1] |  ”

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### Eric Kaufmann on sub-replacement fertility[edit]

Eric Kaufmann wrote about the problem of sub-fertility in the developed world in his book Whither the Child?: Causes and Consequences of Low Fertility.[2]

## See also[edit]

* Atheism and fertility rates

## External links[edit]

* Demographic winter documentary \- video

* Eric Kaufmann - Whither the Child: Causes and Consequences of Low Fertility \- video

## Notes[edit]

1. ↑ Demographic Winter: The decline of the human family - Amazon
2. ↑ Whither the Child? Causes and Consequences of Low Fertility, University of Virginia, Department of Sociology