When pronounced in sociological contexts, the term population refers to the group of people who live in a certain geographic area, whose number is calculated based on a statistical evolution. On the other hand, in biological terms, it is the group of individuals belonging to the same species and inhabiting the same geographical area.
The most popular use of the term population refers to the group of people who inhabit planet Earth or any division thereof.
When it comes to populations made up exclusively by humans, demography is the discipline that deals with their statistical study , generally this type of study is governed by probability laws and the conclusions may not be general or applied to all individuals.
There are three theories, each with a different motivation, as they try to explain why population increases in some countries of the world
Biological theory, for example, holds that man is like any other living being, unable to control his growth in numbers.
In opposition to this, cultural theory has man as a rational being who controls population growth and who knows how to use different criteria.
A clear example of this issue is what happened in China as a consequence of the disproportionate population growth, so the government decided to stop this fact by demanding that each family could only bear one child .
Population density is the total number of individuals that inhabit a certain geographic area and can be known by dividing the total number of inhabitants by the area they inhabit. Generally, the countries with the highest population density are those known as microstates: Monaco, Singapore, Vatican City and Malta.