Menu Close

Causes of the rapid increase in human numbers

pictures of many people

According to the website World, there are 4.5 births per second, or 267 births per minute, throughout the world.

There were precisely 8 000 187 000 people on Earth at the time this article was written, according to Worldometers, IOL reports.

The world’s population increased from 1.65 billion people to 6 billion people just in the 20th century.

With that said, the world welcomed its eighth billion people on November 15th.

The population of the world has more than tripled, according to the UN, since the middle of the 20th century.

The international organization claimed that two trends—on the one hand, the persistently high fertility rates in many nations—and, on the other, the gradual rise in average human longevity as a result of widespread improvements in nutrition, personal hygiene, public health, and medicine—have contributed to the unprecedented growth of the world’s population since 1950.

What are the causes of this rapid population growth, then?

Fertility rates, mortality rates (life expectancy), the population’s initial age distribution, and migration are the four main factors that influence population change and growth, according to research from the Pew Research Centre.

Rate of pregnancy

The Pew Center claims that the slowing of population growth is due to declining fertility rates worldwide.

Global fertility rates are anticipated to continue declining in the ensuing decades, according to the UN Population Division.

Rates of mortality (life expectancy)

The anticipated lifespan in 2022 is 72.98 years, an increase of 0.24 percent from 2021.

Researchers claim that as the population grows as a result of births, it shrinks as a result of deaths. The availability and cost of high-quality healthcare services, as well as everyday behaviors, are factors that, according to researchers, influence the mortality rate.


Global population redistribution is a key process resulting from international migration, claims Hania Zlotnik in her paper “Population Growth and International Migration” that was published by Oxford Academic.

READ MORE: Donkey cart project “extremely costly” at R780k, according to the DA and ActionSA

According to World Scientific researchers, increased migration causes changes in the population distribution between regions, including the critical behavior of population extinction for some regions under a particular set of rules. If the migration is still growing as a result of a pressure to move, the deserted area might become populated once more.

Structure by age

Academics define a population’s age structure as the proportionate representation of individuals in various age groups over a specified period of time in a given population. The birth rate, death rate, and migration of a population are all closely correlated with the age structure.

Related Posts