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Population decline, also known as depopulation, is a reduction in a human population size. Throughout history, Earth's total human population has continued to grow; however, current projections suggest that this long-term trend of steady population growth may be coming to an end.
Possible causes of a societal collapse include natural catastrophe, war, pestilence, famine, economic collapse, population decline or overshoot, mass migration, incompetent leaders, and sabotage by rival civilizations. [2] A collapsed society may revert to a more primitive state, be absorbed into a stronger society, or completely disappear.
Population bottleneck followed by recovery or extinction. A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events such as famines, earthquakes, floods, fires, disease, and droughts; or human activities such as genocide, speciocide, widespread violence or intentional culling.
China's population is projected to crash 55% by the turn of the next century. Italy's will sink 41%, and Brazil's will drop 23%. Top economies face ‘population collapse’ as fertility rates ...
Demographic history is the reconstructed record of human population in the past. Given the lack of population records prior to the 1950s, there are many gaps in our record of demographic history. Given the lack of population records prior to the 1950s, there are many gaps in our record of demographic history.
The Demography of the World Population from 1950 to 2100. Data source: United Nations — World Population Prospects 2017. Demography (from Ancient Greek δῆμος (dêmos) ' people, society ' and -γραφία (-graphía) ' writing, drawing, description ') [1] is the statistical study of human populations: their size, composition (e.g., ethnic group, age), and how they change through the ...
Thomas Robert Malthus, after whom Malthusianism is named. Malthusianism is a theory that population growth is potentially exponential, according to the Malthusian growth model, while the growth of the food supply or other resources is linear, which eventually reduces living standards to the point of triggering a population decline.
Image credits: AprumMol #23. TIL After his lung cancer diagnosis, actor Yul Brynner wished to warn people against smoking. After his death, the american cancer society aired an ad with the actor ...