Demography in the context of Market segment

In world demographics, the world population is the total number of humans currently alive. It was estimated by the United Nations to have exceeded eight billion in mid-November 2022. It took around 300,000 years of human prehistory and history for the human population to reach a billion and only 218 more years from there to reach 8 billion.

The human population has experienced continuous growth following the Great Famine of 1315–1317 and the end of the Black Death in 1350, when it was nearly 370,000,000. The highest global population growth rates, with increases of over 1.8% per year, occurred between 1955 and 1975, peaking at 2.1% between 1965 and 1970. The growth rate declined to 1.1% between 2015 and 2020 and is projected to decline further in the 21st century. The global population is still increasing, but there is significant uncertainty about its long-term trajectory due to changing fertility and mortality rates. The UN Department of Economics and Social Affairs projects between 9 and 10 billion people by 2050 and gives an 80% confidence interval of 10–12 billion by the end of the 21st century, with a growth rate by then of zero. Other demographers predict that the human population will begin to decline in the second half of the 21st century.

A subregion is a part of a larger geographical region or continent. Cardinal directions are commonly used to define subregions. There are many criteria for creating systems of subregions; this article is focusing on the United Nations geoscheme, which is a changing, constantly updated, UN tool based on specific political geography and demography considerations relevant in UN statistics.

The World Factbook, also known as the CIA World Factbook, is a reference resource produced by the United States' Central Intelligence Agency (CIA) with almanac-style information about the countries of the world. The official print version is available from the Government Publishing Office. The Factbook is available in website and downloadable formats. It provides a two- to three-page summary of the demographics, geography, communications, government, economy, and military of 258 international entities, including U.S.-recognized countries, dependencies, and other areas in the world.

The World Factbook is prepared by the CIA for the use of U.S. government officials, and its style, format, coverage, and content are primarily designed to meet their requirements. It is also frequently used as a resource for academic research papers and news articles. As a work of the U.S. government, it is in the public domain in the United States.

Geopolitics (from Ancient Greek γῆ gê 'earth, land' and πολιτική politikḗ 'politics') is the study of the effects of Earth's geography on politics and international relations. Geopolitics usually refers to countries and relations between them. According to multiple researchers, the term is currently being used to describe a broad spectrum of concepts, in a general sense used as "a synonym for international political relations", but more specifically "to imply the global structure of such relations"; this usage builds on an "early-twentieth-century term for a pseudoscience of political geography" and other pseudoscientific theories of historical and geographic determinism.

At the level of international relations, geopolitics is a method of studying foreign policy to understand, explain, and predict international political behavior through geographical variables. These include area studies, climate, topography, demography, natural resources, and applied science of the region being evaluated.

A travel to work area (TTWA) is a statistical tool used by UK Government agencies and local authorities, especially by the Department for Work and Pensions and Jobcentres, to indicate an area where the population would generally commute to a larger town, city or conurbation for the purposes of employment.

This is a list of the current 54 African countries sorted by population, also sorted by normalized demographic projections from the most recently available census or demographic data. Africa is the fastest growing continent in the world, currently increasing by 2.35% per year as of 2021. Africa is also the continent with the youngest population, as 60% of Africans are 24 years of age or younger. This list also includes the French department Réunion, and the partially recognized country Sahrawi Arab Democratic Republic, commonly known as Western Sahara, which is a member of the African Union.

This is a demography of the population of Peru including population density, ethnicity, religious affiliations and other aspects of the population.

Peru is a multiethnic country, which means that it is home to people of many different historical backgrounds. Therefore, it is a multicultural country as well. Since it is a multiethnic society, Peruvian people usually treat their nationality as a citizenship instead of an ethnicity. The Peruvian census does not contain information about ethnicity so only rough estimates are available.

In ecology, a community is a group or association of populations of two or more different species occupying the same geographical area at the same time, also known as a biocoenosis, biotic community, biological community, ecological community, or life assemblage. The term community has a variety of uses. In its simplest form it refers to groups of organisms in a specific place or time, for example, "the fish community of Lake Ontario before industrialization".

Community ecology or synecology is the study of the interactions between species in communities on many spatial and temporal scales, including the distribution, structure, abundance, demography, and interactions of coexisting populations. The primary focus of community ecology is on the interactions between populations as determined by specific genotypic and phenotypic characteristics. It is important to understand the origin, maintenance, and consequences of species diversity when evaluating community ecology.

Gentrification is the process whereby the character of a neighborhood changes through the influx of more affluent residents (the "gentry") and investment. There is no agreed-upon definition of gentrification. In public discourse, it has been used to describe a wide array of phenomena, sometimes in a pejorative connotation.

Gentrification is a common and controversial topic in urban politics and planning. Gentrification often increases the economic value of a neighborhood, but can be controversial due to changing demographic composition and potential displacement of incumbent residents. Gentrification is more likely when there is an undersupply of housing and rising home values in a metropolitan area.

Demographic features of the population of Turkey include population density, ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of the population. As of 1 July 2025, the population of Turkey was over 85.8 million with an annual growth rate of 0.36%. This official population number excludes the registered Syrian refugees under temporary protection status which have a population of about 2.6 million as of the date.

Turks are the largest ethnic group, comprising 70–75% of the population while Kurds are the second largest with 19%. The others, including Armenians, Arabs, Assyrians, Albanians, Bulgarians, Bosniaks, Circassians, Chechens, Georgians, Greeks, Pomaks, Rum, Russians, Romani, Jews, Laz people and others make 6–11% of the population according to a 2016 estimate by the CIA.

A generation is all of the people born and living at about the same time, regarded collectively. It also is "the average period, generally considered to be about 20–30 years, during which children are born and grow up, become adults, and begin to have children." In kinship, generation is a structural term, designating the parent–child relationship. In biology, generation also means biogenesis, reproduction, and procreation.

Generation is also a synonym for birth/age cohort in demographics, marketing, and social science, where it means "people within a delineated population who experience the same significant events within a given period of time." The term generation in this sense, also known as social generations, is widely used in popular culture and is a basis of sociological analysis. Serious analysis of generations began in the nineteenth century, emerging from an increasing awareness of the possibility of permanent social change and the idea of youthful rebellion against the established social order. Some analysts believe that a generation is one of the fundamental social categories in a society; others consider generation less important than class, gender, race, and education.

Demographic features of the population of the area commonly described as the Palestinian territories includes information on ethnicity, education level, health of the populace, economic status, religious affiliations and other aspects of that population.

According to a commonly used definition as relating to an application of the 1949 Armistice Agreement green line, the Palestinian territories have contributory parts of the Gaza Strip and the West Bank (including East Jerusalem).

Demographic transition is a phenomenon and theory in the social sciences (especially demography) referring to the historical shift from high to low rates of birth and death, as societies attain several attributes: more technology, education (especially for women), and economic development. The demographic transition has occurred in most of the world over the past two centuries, bringing the unprecedented population growth of the post-Malthusian period, and then reducing birth rates and population growth significantly in all regions of the world. The demographic transition strengthens the economic growth process through three changes: reduced dilution of capital and land stock; increased investment in human capital; and increased size of the labor force relative to the total population, along with a changed distribution of population age. Although this shift has occurred in many industrialized countries, the theory and model are often imprecise when applied to individual countries, because of specific social, political, and economic factors that affect particular populations.

Nevertheless, the existence of some type of demographic transition is widely accepted because of the well-established historical correlation between two factors: dropping fertility rates, and social and economic development. Scholars debate whether industrialization and higher incomes lead to lower population, or vice versa. Scholars also debate to what extent various proposed and sometimes interrelated factors are involved—factors such as higher per capita income, lower mortality, old-age security, and increased demand for human capital. Human capital gradually increased during the second stage of the Industrial Revolution, which coincided with the demographic transition. The increasing role of human capital in the production process led families to invest this capital in children, which may have been the beginning of the demographic transition.

Medieval demography is the study of human demography in Europe and the Mediterranean during the Middle Ages. It estimates and seeks to explain the number of people who were alive during the Medieval period, population trends, life expectancy, family structure, and related issues. Demography is considered a crucial element of historical change throughout the Middle Ages.

The population of Europe remained at a low level in the Early Middle Ages, boomed during the High Middle Ages and reached a peak around 1300, then a number of calamities caused a steep decline, the nature of which historians have debated. Population levels began to recover around the late 15th century, gaining momentum in the early 16th century.