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  2. Estimates of historical world population - Wikipedia

    en.wikipedia.org/wiki/Estimates_of_historical...

    Graph of world population over the past 12,000 years . As a general rule, the confidence of estimates on historical world population decreases for the more distant past. Robust population data exist only for the last two or three centuries. Until the late 18th century, few governments had ever performed an accurate census.

  3. World population milestones - Wikipedia

    en.wikipedia.org/wiki/World_population_milestones

    The "Day of Seven Billion" was targeted by the United States Census Bureau to be in March 2012, [15] while the Population Division of the United Nations suggested 31 October 2011, [16] and the latter date was officially designated by the United Nations Population Fund (UNFPA) as the approximate day on which the world's population reached seven ...

  4. World population - Wikipedia

    en.wikipedia.org/wiki/World_population

    During the 20th century, the global population saw its greatest increase in known history, rising from about 1.6 billion in 1900 to over 6 billion in 2000 [102] as the whole world entered the early phases of what has come to be called the "demographic transition".

  5. History Repeats Itself: Here's How the 2020s Are ... - AOL

    www.aol.com/history-repeats-itself-heres-2020s...

    1920s: The Spanish Flu. In the fall of 1918, a mutated version of the virus that claimed its first victims in the spring made its way around the world, causing the death rate to escalate quickly ...

  6. List of countries by past and projected future population

    en.wikipedia.org/wiki/List_of_countries_by_past...

    The national 1 July, mid-year population estimates (usually based on past national censuses) supplied in these tables are given in thousands. The retrospective figures use the present-day names and world political division: for example, the table gives data for each of the 15 republics of the former Soviet Union, as if they had already been independent in 1950.

  7. Demographics of the world - Wikipedia

    en.wikipedia.org/wiki/Demographics_of_the_world

    The current world population growth is approximately 1.09%. [7] People under 15 years of age made up over a quarter of the world population (25.18%), and people age 65 and over made up nearly ten percent (9.69%) in 2021. [7] The world population more than tripled during the 20th century from about 1.65 billion in 1900 to 5.97 billion in 1999.

  8. List of epidemics and pandemics - Wikipedia

    en.wikipedia.org/wiki/List_of_epidemics_and...

    Percentage of population lost Years Location 1 Spanish flu: Influenza A/H1N1: 17–100 million 1–5.4% of global population [4] 1918–1920 Worldwide 2 Plague of Justinian: Bubonic plague 15–100 million 25–60% of European population [5] 541–549 North Africa, Europe, and Western Asia 3 HIV/AIDS pandemic: HIV/AIDS: 44 million (as of 2025) [a]

  9. Historical demography - Wikipedia

    en.wikipedia.org/wiki/Historical_demography

    Historical demography is the quantitative study of human population in the past. It is concerned with population size, with the three basic components of population change (fertility, mortality, and migration), and with population characteristics related to those components, such as marriage, socioeconomic status, and the configuration of families.