World population

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High, medium, and low projections of the future human world population World Population Prospects.svg
High, medium, and low projections of the future human world population

In world demographics, the world population is the total number of humans currently living. 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 222 years more to reach 8 billion. [2]

Contents

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. [3] 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. [4] The growth rate declined to 1.1% between 2015 and 2020 and is projected to decline further in the 21st century. [5] The global population is still increasing, but there is significant uncertainty about its long-term trajectory due to changing fertility and mortality rates. [6] 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, [1] 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. [7]

The total number of births globally is currently (2015–2020) 140 million/year, which is projected to peak during the period 2040–2045 at 141 million/year and then decline slowly to 126 million/year by 2100. [8] The total number of deaths is currently 57 million/year and is projected to grow steadily to 121 million/year by 2100. [9]

The median age of human beings as of 2020 is 31 years. [10]

History

Visual comparison of the world population in past and present Illustration of contemporary and past human populations Our World in Data.png
Visual comparison of the world population in past and present

Estimates of world population by their nature are an aspect of modernity, possible only since the Age of Discovery. Early estimates for the population of the world [11] date to the 17th century: William Petty, in 1682, estimated the world population at 320 million (current estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent with current estimates). [12] More refined estimates, broken down by continents, were published in the first half of the 19th century, at 600 million to 1 billion in the early 1800s and 800 million to 1 billion in the 1840s. [13]

It is difficult for estimates to be better than rough approximations, as even current population estimates are fraught with uncertainties from 3% to 5%. [14]

Ancient and post-classical history

Estimates of the population of the world at the time agriculture emerged in around 10,000 BC have ranged between 1 million and 15 million. [15] [16] Even earlier, genetic evidence suggests humans may have gone through a population bottleneck of between 1,000 and 10,000 people about 70,000 BC, according to the now largely discredited Toba catastrophe theory. By contrast, it is estimated that around 50–60 million people lived in the combined eastern and western Roman Empire in the 4th century AD. [17]

The Plague of Justinian caused Europe's population to drop by around 50% between the 6th and 8th centuries AD. [18] The population of Europe was more than 70 million in 1340. [19] From 1340 to 1400, the world's population fell from an estimated 443 million to 350–375 million, [20] with the Indian subcontinent suffering the most tremendous loss and Europe suffering the Black Death pandemic; [21] it took 200 years for European population figures to recover. [22] The population of China decreased from 123 million in 1200 to 65 million in 1393, [23] presumably from a combination of Mongol invasions, famine, and plague. [24]

Starting in AD 2, the Han dynasty of ancient China kept consistent family registers to properly assess the poll taxes and labor service duties of each household. [25] In that year, the population of Western Han was recorded as 57,671,400 individuals in 12,366,470 households, decreasing to 47,566,772 individuals in 9,348,227 households by AD 146, towards the end of the Han dynasty. [25] From 200 to 400, the world population fell from an estimated 257 million to 206 million, with China suffering the greatest loss. [21] At the founding of the Ming dynasty in 1368, China's population was reported to be close to 60 million; toward the end of the dynasty in 1644, it may have approached 150 million. [26] England's population reached an estimated 5.6 million in 1650, up from an estimated 2.6 million in 1500. [27] New crops that were brought to Asia and Europe from the Americas by Portuguese and Spanish colonists in the 16th century are believed to have contributed to population growth. [28] [29] [30] Since their introduction to Africa by Portuguese traders in the 16th century, [31] maize and cassava have similarly replaced traditional African crops as the most important staple food crops grown on the continent. [32]

The pre-Columbian population of the Americas is uncertain; historian David Henige called it "the most unanswerable question in the world." [33] By the end of the 20th century, scholarly consensus favored an estimate of roughly 55 million people, but numbers from various sources have ranged from 10 million to 100 million. [34] Encounters between European explorers and populations in the rest of the world often introduced local epidemics of extraordinary virulence. [35] According to the most extreme scholarly claims, as many as 90% of the Native American population of the New World died of Old World diseases such as smallpox, measles, and influenza. [36] Over the centuries, the Europeans had developed high degrees of immunity to these diseases, while the indigenous peoples had no such immunity. [37]

Modern history

Map showing urban areas with at least one million inhabitants in 2006. Only 3% of the world's population lived in urban areas in 1800; this proportion had risen to 47% by 2000, and reached 50.5% by 2010. By 2050, the proportion may reach 70%. 2006megacities.svg
Map showing urban areas with at least one million inhabitants in 2006. Only 3% of the world's population lived in urban areas in 1800; this proportion had risen to 47% by 2000, and reached 50.5% by 2010. By 2050, the proportion may reach 70%.

During the European Agricultural and Industrial Revolutions, the life expectancy of children increased dramatically. [40] The percentage of the children born in London who died before the age of five decreased from 74.5% in 1730–1749 to 31.8% in 1810–1829. [41] [42] Between 1700 and 1900, Europe's population increased from about 100 million to over 400 million. [43] Altogether, the areas populated by people of European descent comprised 36% of the world's population in 1900. [44]

Population growth in the Western world became more rapid after the introduction of vaccination and other improvements in medicine and sanitation. [45] Improved material conditions led to the population of Britain increasing from 10 million to 40 million in the 19th century. [46] The population of the United Kingdom reached 60 million in 2006. [47] The United States saw its population grow from around 5.3 million in 1800 to 106 million in 1920, exceeding 307 million in 2010. [48]

The first half of the 20th century in Imperial Russia and the Soviet Union was marked by a succession of major wars, famines and other disasters which caused large-scale population losses (approximately 60 million excess deaths). [49] [50] After the collapse of the Soviet Union, Russia's population declined significantly – from 150 million in 1991 to 143 million in 2012 [51] – but by 2013 this decline appeared to have halted. [52]

Many countries in the developing world have experienced extremely rapid population growth since the early 20th century, due to economic development and improvements in public health. China's population rose from approximately 430 million in 1850 to 580 million in 1953, [53] and now stands at over 1.3 billion. The population of the Indian subcontinent, which was about 125 million in 1750, increased to 389 million in 1941; [54] today, India, Pakistan and Bangladesh are collectively home to about 1.63 billion people. [55] Java, an island in Indonesia, had about 5 million inhabitants in 1815; it had a population of over 139 million in 2020. [56] In just one hundred years, the population of Brazil decupled (x10), from about 17 million in 1900, or about 1% of the world population in that year, to about 176 million in 2000, or almost 3% of the global population in the very early 21st century. Mexico's population grew from 13.6 million in 1900 to about 112 million in 2010. [57] [58] Between the 1920s and 2000s, Kenya's population grew from 2.9 million to 37 million. [59]

Milestones by the billions

World population milestones in billions [60] (Worldometers estimates)
Population12345678910
Year1804192719601974198719992011202220372057
Years elapsed200,000+1233314131212111520

The UN estimated that the world population reached one billion for the first time in 1804. It was another 123 years before it reached two billion in 1927, but it took only 33 years to reach three billion in 1960. [61] Thereafter, it took 14 years for the global population to reach four billion in 1974, 13 years to reach five billion in 1987, 12 years to reach six billion in 1999 and, according to the United States Census Bureau, 13 years to reach seven billion in March 2012. [62] The United Nations, however, estimated that the world population reached seven billion in October 2011. [63] [64] [65]

According to the UN, the global population reached eight billion in November 2022, [66] but because the growth rate is slowing, it will take another 15 years to reach around 9 billion by 2037 and 20 years to reach 10 billion by 2057. [67] Alternative scenarios for 2050 range from a low of 7.4 billion to a high of more than 10.6 billion. [68] Projected figures vary depending on underlying statistical assumptions and the variables used in projection calculations, especially the fertility and mortality variables. Long-range predictions to 2150 range from a population decline to 3.2 billion in the "low scenario", to "high scenarios" of 24.8 billion. [68] One extreme scenario predicted a massive increase to 256 billion by 2150, assuming the global fertility rate remained at its 1995 level of 3.04 children per woman; however, by 2010 the global fertility rate had declined to 2.52. [69] [70]

There is no estimation for the exact day or month the world's population surpassed one or two billion. The points at which it reached three and four billion were not officially noted, but the International Database of the United States Census Bureau placed them in July 1959 and April 1974 respectively. The United Nations did determine, and commemorate, the "Day of 5 Billion" on 11 July 1987, and the "Day of 6 Billion" on 12 October 1999. The Population Division of the United Nations declared the "Day of Seven Billion" to be 31 October 2011. [71] The United Nations marked the birth of the eight billionth person on 15 November 2022. [72] [66]

Global demographics

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>80
77.5-80
75-77.5
72.5-75
70-72.5
67.5-70
65-67.5
60-65
55-60
50-55
2015 map showing average life expectancy by country in years. In 2015, the World Health Organization estimated the average global life expectancy as 71.4 years. Expectancy of life.svg
  •   >80
  •   77.5–80
  •   75–77.5
  •   72.5–75
  •   70–72.5
  •   67.5–70
  •   65–67.5
  •   60–65
  •   55–60
  •   50–55
2015 map showing average life expectancy by country in years. In 2015, the World Health Organization estimated the average global life expectancy as 71.4 years.

As of 2020, the global sex ratio is approximately 1.01 males to 1 female. [74] Approximately 24.7% of the global population is aged under 15, while 65.2% is aged 15–64 and 10.1% is aged 65 or over. [74] The median age of the world's population is estimated to be 31 years in 2020, [10] and is expected to rise to 37.9 years by 2050. [75]

According to the World Health Organization, the global average life expectancy is 73.3 years as of 2020, with women living an average of 75.9 years and men approximately 70.8 years. [76] In 2010, the global fertility rate was estimated at 2.44 children per woman. [77] In June 2012, British researchers calculated the total weight of Earth's human population as approximately 287 million tonnes (630 billion pounds), with the average person weighing around 62 kilograms (137 lb). [78]

The IMF estimated nominal 2021 gross world product at US$94.94 trillion, giving an annual global per capita figure of around US$12,290. [79] Around 9.3% of the world population live in extreme poverty, subsisting on less than US$1.9 per day; [80] around 8.9% are malnourished. [81] 87% of the world's over-15s are considered literate. [82] As of January 2024, there were about 5 billion global Internet users, constituting 66% of the world population. [83]

The Han Chinese are the world's largest single ethnic group, constituting over 19% of the global population in 2011. [84] The world's most-spoken languages [lower-alpha 1] are English (1.132B), Mandarin Chinese (1.117B), Hindi (615M), Spanish (534M) and French (280M). More than three billion people speak an Indo-European language, which is the largest language family by number of speakers. Standard Arabic is a language with no native speakers, but the total number of speakers is estimated at 274 million people. [85]

The largest religious categories in the world as of 2020 are estimated as follows: Christianity (31%), Islam (25%), Unaffiliated (16%) and Hinduism (15%). [86]

Population by region

Six of the Earth's seven continents are permanently inhabited on a large scale. Asia is the most populous continent, with its 4.64 billion inhabitants accounting for 60% of the world population. The world's two most populated countries, India and China, together constitute about 36% of the world's population. Africa is the second most populated continent, with around 1.34 billion people, or 17% of the world's population. Europe's 747 million people make up 10% of the world's population as of 2020, while the Latin American and Caribbean regions are home to around 653 million (8%). Northern America, primarily consisting of the United States and Canada, has a population of around 368 million (5%), and Oceania, the least populated region, has about 42 million inhabitants (0.5%). [87] Antarctica only has a very small, fluctuating population of about 1200 people based mainly in polar science stations. [88]

Population pyramid of the world in continental groupings in 2023. The left and right sides of the vertical axis represent different sexes (male and female). Population pyramid of the world in continental groupings 2023.svg
Population pyramid of the world in continental groupings in 2023. The left and right sides of the vertical axis represent different sexes (male and female).
Current world population and latest projection according the UN. Population in (millions) and percent of the global population in that year. [89]
Region2022 (percent)2030 (percent)2050 (percent)
Sub-Saharan Africa 1,152 (14.51%)1,401 (16.46%)2,094 (21.62%)
Northern Africa and Western Asia549 (6.91%)617 (7.25%)771 (7.96%)
Central Asia and Southern Asia 2,075 (26.13%)2,248 (26.41%)2,575 (26.58%)
Eastern Asia and Southeastern Asia2,342 (29.49%)2,372 (27.87%)2,317 (23.92%)
Europe and Northern America 1,120 (14.10%)1,129 (13.26%)1,125 (11.61%)
Latin America and the Caribbean 658 (8.29%)695 (8.17%)749 (7.73%)
Australia and New Zealand31 (0.39%)34 (0.40%)38 (0.39%)
Oceania14 (0.18%)15 (0.18%)20 (0.21%)
World7,9428,5129,687
Population by region (2020 estimates)
RegionDensity
(inhabitants/km2)
Population
(millions)
Most populous countryMost populous city (metropolitan area)
Asia104.14,6411,439,090,595 Flag of India.svg  India 13,515,000 Flag of Japan.svg Tokyo Metropolis
(37,400,000 Flag of Japan.svg Greater Tokyo Area)
Africa44.41,340211,401,000 Flag of Nigeria.svg  Nigeria 9,500,000 Flag of Egypt.svg Cairo
(20,076,000 Flag of Egypt.svg Greater Cairo)
Europe73.4747146,171,000 Flag of Russia.svg  Russia, approx. 110 million in Europe 13,200,000 Flag of Russia.svg Moscow
(20,004,000 Flag of Russia.svg Moscow metropolitan area)
Latin America24.1653214,103,000 Flag of Brazil.svg  Brazil 12,252,000 Flag of Brazil.svg São Paulo City
(21,650,000 Flag of Brazil.svg São Paulo Metro Area)
Northern America [note 1] 14.9368332,909,000 Flag of the United States.svg  United States 8,804,000 Flag of the United States.svg New York City
(23,582,649 Flag of the United States.svg New York metropolitan area [90] )
Oceania54225,917,000 Flag of Australia (converted).svg  Australia 5,367,000 Flag of Australia (converted).svg Sydney
Antarctica ~00.004 [88] N/A [note 2] 1,258 Proposed flag of Antarctica (Graham Bartram).svg McMurdo Station

Largest populations by country

Cartogram showing the distribution of the world population, each square represents half a million people. Global population cartogram.png
Cartogram showing the distribution of the world population, each square represents half a million people.
choropleth showing Population density (people per square kilometre) by country or U.S. state in 2019 People's -Km2 for all countries (and us states, uk kingdoms).png
choropleth showing Population density (people per square kilometre) by country or U.S. state in 2019
1901 to 2021 population graph of the five countries with the highest current populations Top 5 Country Population Graph 1901 to 2021.svg
1901 to 2021 population graph of the five countries with the highest current populations

Ten most populous countries

Approximately 4.6 billion people live in these ten countries, representing around 57% of the world's population as of July 2023.

The UN estimates that by 2023 India will have overtaken China in having the largest population. [99] [91]

World population (millions, UN estimates) [100]
#Most populous countries200020152030 [upper-alpha 1]
1 Flag of the People's Republic of China.svg China [upper-alpha 2] 1,2701,3761,416
2 Flag of India.svg India 1,0531,3111,528
3 Flag of the United States.svg United States 283322356
4 Flag of Indonesia.svg Indonesia 212258295
5 Flag of Pakistan.svg Pakistan 136208245
6 Flag of Brazil.svg Brazil 176206228
7 Flag of Nigeria.svg Nigeria 123182263
8 Flag of Bangladesh.svg Bangladesh 131161186
9 Flag of Russia.svg Russia 146146149
10 Flag of Mexico.svg Mexico 103127148
World total6,1277,3498,501
Notes:
  1. 2030 = Medium variant.
  2. China excludes Hong Kong and Macau.

Most densely populated countries

The tables below list the world's most densely populated countries, both in absolute terms and in comparison to their total populations, as of November 2022. All areas and populations are from The World Factbook , unless otherwise noted.

Population density (people per km ) map of the world in 2020. Red areas denote regions of highest population density Population Density, v4.11, 2020 (48009093621).jpg
Population density (people per km ) map of the world in 2020. Red areas denote regions of highest population density
10 most densely populated countries (with population above 5 million) [101]
RankCountryPopulationArea
(km2)
Density
(pop/km2)
1Flag of Singapore.svg  Singapore 5,921,2317198,235
2Flag of Bangladesh.svg  Bangladesh 165,650,475148,4601,116
3

Flag of Palestine.svg  Palestine [note 3] [102]

5,223,0006,025867
4Flag of the Republic of China.svg  Taiwan [note 4] 23,580,71235,980655
5Flag of South Korea.svg  South Korea 51,844,83499,720520
6Flag of Lebanon.svg  Lebanon 5,296,81410,400509
7Flag of Rwanda.svg  Rwanda 13,173,73026,338500
8Flag of Burundi.svg  Burundi 12,696,47827,830456
9Flag of India.svg  India 1,389,637,4463,287,263423
10Flag of the Netherlands.svg  Netherlands 17,400,82441,543419
Countries ranking highly in both total population (more than 20 million people) and population density (more than 250 people per square kilometer) [101]
RankCountryPopulationArea
(km2)
Density
(pop/km2)
Population
trend[ citation needed ]
1Flag of India.svg  India 1,389,637,4463,287,263423Growing
2Flag of Pakistan.svg  Pakistan 242,923,845796,095305Rapidly growing
3Flag of Bangladesh.svg  Bangladesh 165,650,475148,4601,116Growing
4Flag of Japan.svg  Japan 124,214,766377,915329Declining [103]
5Flag of the Philippines.svg  Philippines 114,597,229300,000382Growing
6Flag of Vietnam.svg  Vietnam 103,808,319331,210313Growing
7Flag of the United Kingdom.svg  United Kingdom 67,791,400243,610278Growing
8Flag of South Korea.svg  South Korea 51,844,83499,720520Steady
9Flag of the Republic of China.svg  Taiwan 23,580,71235,980655Steady
10Flag of Sri Lanka.svg  Sri Lanka 23,187,51665,610353Growing

Fluctuation

Estimates of population evolution in different continents between 1950 and 2050, according to the United Nations. The vertical axis is logarithmic and is in millions of people. World population (UN).svg
Estimates of population evolution in different continents between 1950 and 2050, according to the United Nations. The vertical axis is logarithmic and is in millions of people.

Population size fluctuates at differing rates in differing regions. Nonetheless, population growth has been the long-standing trend on all inhabited continents, as well as in most individual states. 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 [104] as the whole world entered the early phases of what has come to be called the "demographic transition". Some of the key factors contributing to this increase included the lessening of the mortality rate in many countries by improved sanitation and medical advances, and a massive increase in agricultural productivity attributed to the Green Revolution. [105] [106] By 2000, there were approximately ten times as many people on Earth as there had been in 1700.

However, this rapid growth did not last. During the period 2000–2005, the United Nations estimates that the world's population was growing at an annual rate of 1.3% (equivalent to around 80 million people), down from a peak of 2.1% during the period 1965–1970. [5] Globally, although the population growth rate has been steadily declining from its peak in 1968, [107] growth still remains high in Sub-Saharan Africa. [108]

Map of countries by fertility rate (2020), according to the Population Reference Bureau Total Fertility Rate Map by Country.svg
Map of countries by fertility rate (2020), according to the Population Reference Bureau
A world population clock in August 2022 at Eureka! in Halifax, West Yorkshire World population counter, Eureka, Halifax, West Yorkshire (27th August 2022) 001.jpg
A world population clock in August 2022 at Eureka! in Halifax, West Yorkshire

In fact, during the 2010s, Japan and some countries in Europe began to reduce in population, due to sub-replacement fertility rates. [103]

In 2019, the United Nations reported that the rate of population growth continues to decline due to the ongoing global demographic transition. If this trend continues, the rate of growth may diminish to zero by 2100, concurrent with a world population plateau of 10.9 billion. [5] [67] However, this is only one of many estimates published by the UN; in 2009, UN population projections for 2050 ranged between around 8 billion and 10.5 billion. [109] An alternative scenario is given by the statistician Jorgen Randers, who argues that traditional projections insufficiently take into account the downward impact of global urbanization on fertility. Randers' "most likely scenario" reveals a peak in the world population in the early 2040s at about 8.1 billion people, followed by decline. [110] Adrian Raftery, a University of Washington professor of statistics and of sociology, states that "there's a 70 percent probability the world population will not stabilize this century. Population, which had sort of fallen off the world's agenda, remains a very important issue." [111]

Annual population growth

Global annual population growth [112]
YearPopulationYearly growthDensity
(pop/km2)
%Number
19512,543,130,3801.75%43,808,22317
19522,590,270,8991.85%47,140,51917
19532,640,278,7971.93%50,007,89818
19542,691,979,3391.96%51,700,54218
19552,746,072,1412.01%54,092,80218
19562,801,002,6312.00%54,930,49019
19572,857,866,8572.03%56,864,22619
19582,916,108,0972.04%58,241,24020
19592,970,292,1881.86%54,184,09120
19603,019,233,4341.65%48,941,24620
19613,068,370,6091.63%49,137,17521
19623,126,686,7431.90%58,316,13421
19633,195,779,2472.21%69,092,50421
19643,267,212,3382.24%71,433,09122
19653,337,111,9832.14%69,899,64522
19663,406,417,0362.08%69,305,05323
19673,475,448,1662.03%69,031,13023
19683,546,810,8082.05%71,362,64224
19693,620,655,2752.08%73,844,46724
19703,695,390,3362.06%74,735,06125
19713,770,163,0922.02%74,772,75625
19723,844,800,8851.98%74,637,79326
19733,920,251,5041.96%75,450,61926
19743,995,517,0771.92%75,265,57327
19754,069,437,2311.85%73,920,15427
19764,142,505,8821.80%73,068,65128
19774,215,772,4901.77%73,266,60828
19784,289,657,7081.75%73,885,21829
19794,365,582,8711.77%75,925,16329
19804,444,007,7061.80%78,424,83530
19814,524,627,6581.81%80,619,95230
19824,607,984,8711.84%83,357,21331
19834,691,884,2381.82%83,899,36732
19844,775,836,0741.79%83,951,83632
19854,861,730,6131.80%85,894,53933
19864,950,063,3391.82%88,332,72633
19875,040,984,4951.84%90,921,15634
19885,132,293,9741.81%91,309,47934
19895,223,704,3081.78%91,410,33435
19905,316,175,8621.77%92,471,55436
19915,406,245,8671.69%90,070,00536
19925,492,686,0931.60%86,440,22637
19935,577,433,5231.54%84,747,43037
19945,660,727,9931.49%83,294,47038
19955,743,219,4541.46%82,491,46139
19965,825,145,2981.43%81,925,84439
19975,906,481,2611.40%81,335,96340
19985,987,312,4801.37%80,831,21940
19996,067,758,4581.34%80,445,97841
20006,148,898,9751.34%81,140,51741
20016,230,746,9821.33%81,848,00742
20026,312,407,3601.31%81,660,37842
20036,393,898,3651.29%81,491,00543
20046,475,751,4781.28%81,853,11343
20056,558,176,1191.27%82,424,64144
20066,641,416,2181.27%83,240,09945
20076,725,948,5441.27%84,532,32645
20086,811,597,2721.27%85,648,72846
20096,898,305,9081.27%86,708,63646
20106,985,603,1051.27%87,297,19747
20117,073,125,4251.25%87,522,32047
20127,161,697,9211.25%88,572,49648
20137,250,593,3701.24%88,895,44949
20147,339,013,4191.22%88,420,04949
20157,426,597,5371.19%87,584,11850
20167,513,474,2381.17%86,876,70150
20177,599,822,4041.15%86,348,16651
20187,683,789,8281.10%83,967,42452
20197,764,951,0321.06%81,161,20452
20207,840,952,8800.98%76,001,84853
20217,909,295,1510.87%68,342,27153
20227,975,105,1560.83%65,810,00554
20238,045,311,4470.88%70,206,29154

Population growth by region

The table below shows historical and predicted regional population figures in millions. [113] [114] [115] The availability of historical population figures varies by region.

World historical and predicted populations (in millions) [116] [117] [118]
Region15001600170017501800185019001950199920082010201220502150
World5856607107919781,2621,6502,5216,0086,7076,8967,0529,7259,746
Africa861141061061071111332217839731,0221,0522,4782,308
Asia2823504115026358099471,4023,7004,0544,1644,2505,2675,561
Europe168170178190203276408547675732738740734517
Latin America [Note 1] 40201016243874167508577590603784912
Northern America [Note 1] 632272682172312337345351433398
Oceania333222613303437385751
World historical and predicted populations by percentage distribution [116] [117]
Region15001600170017501800185019001950199920082010201220502150
Africa14.717.314.913.410.98.88.18.813.014.514.815.225.523.7
Asia48.253.057.963.564.964.157.455.661.660.460.460.354.257.1
Europe28.725.825.120.620.821.924.721.711.210.910.710.57.65.3
Latin America [Note 1] 6.83.01.42.02.53.04.56.68.58.68.68.68.19.4
Northern America [Note 1] 1.00.50.30.30.72.15.06.85.25.05.05.04.54.1
Oceania0.50.50.40.30.20.20.40.50.50.50.50.50.60.5

Past population

The following table gives estimates, in millions, of population in the past. The data for 1750 to 1900 are from the UN report "The World at Six Billion" [119] whereas the data from 1950 to 2015 are from a UN data sheet. [100]

YearWorldAfricaAsiaEuropeLatin America
& Carib. [Note 1]
North America
[Note 1]
OceaniaNotes
70,000 BC< 0.015 [120]
10,000 BC4 [121]
8000 BC5
6500 BC5
5000 BC5
4000 BC7
3000 BC14
2000 BC27
1000 BC507339[ citation needed ]
500 BC100146616
AD 12002314128
10004007026950812
150045886243843933
16005801143391111033
17006821064361251023
17507911065021631622
18001,0001076562032473
18501,26211180927638262
19001,65013394740874826
19502,5252291,39454916917212.7 [122]
19552,7582541,53457719318714.2
19603,0182851,68760622120415.8
19653,3223221,87563525421917.5
19703,6823662,12065728823119.7
19754,0614162,37867732624221.5
19804,4404782,62669436525423.0
19854,8535502,89770840626724.9
19905,3106323,20272144728127.0
19955,7357203,47572848729629.1
20006,1278143,71472652731431.1
20056,5209203,94572956432933.4
20106,9301,0444,17073560034436.4
20157,3491,1864,39373863435839.3

Using the above figures, the change in population from 2010 to 2015 was:

  1. 1 2 3 4 5 6 North America is here defined to include the northernmost countries and territories of North America: Canada, the United States, Greenland, Bermuda, and Saint Pierre and Miquelon. Latin America & Carib. comprises Mexico, Central America, the Caribbean, and South America.

Projections

Long-term global population growth is difficult to predict. The United Nations and the US Census Bureau both give different estimates – according to the UN, the world population reached seven billion in late 2011, [113] while the USCB asserted that this occurred in March 2012. [123] Since 1951 the UN has issued multiple projections of future world population, based on different assumptions. From 2000 to 2005, the UN consistently revised these projections downward, until the 2006 revision, issued on 14 March 2007, revised the 2050 mid-range estimate upwards by 273 million.[ citation needed ]

Complicating the UN's and others' attempts to project future populations is the fact that average global birth rates, as well as mortality rates, are declining rapidly, as the nations of the world progress through the stages of the demographic transition, but both vary greatly between developed countries (where birth rates and mortality rates are often low) and developing countries (where birth and mortality rates typically remain high). Different ethnicities also display varying birth rates.[ citation needed ] Both of these can change rapidly due to disease epidemics, wars and other mass catastrophes, or advances in medicine and public health.

The UN's first report in 1951 showed that during the period 1950–55 the crude birth rate was 36.9/1,000 population and the crude death rate was 19.1/1,000.  By the period 2015–20 both numbers had dropped significantly to 18.5/1,000 for the crude birth rate and 7.5/1,000 for the crude death rate.  UN projections for 2100 show a further decline in the crude birth rate to 11.6/1,000 and an increase in the crude death rate to 11.2/1,000. [124] , [125]

The total number of births globally is currently (2015–20) 140 million/year, is projected to peak during the period 2040–45 at 141 million/year and thereafter decline slowly to 126 million/year by 2100. [8] The total number of deaths is currently 57 million/year and is projected to grow steadily to 121 million/year by 2100. [9]

2012 United Nations projections show a continued increase in population in the near future with a steady decline in population growth rate; the global population is expected to reach between 8.3 and 10.9 billion by 2050. [126] [127] 2003 UN Population Division population projections for the year 2150 range between 3.2 and 24.8 billion. [69] One of many independent mathematical models supports the lower estimate, [128] while a 2014 estimate forecasts between 9.3 and 12.6 billion in 2100, and continued growth thereafter. [129] [130] The 2019 Revision of the UN estimates gives the "medium variant" population as; nearly 8.6 billion in 2030, about 9.7 billion in 2050 and about 10.9 billion in 2100. [131] In December 2019, the German Foundation for World Population projected that the global population will reach 8 billion by 2023 as it increases by 156 every minute. [132] In a modeled future projection by the Institute for Health Metrics and Evaluation the global population was projected to peak in 2064 at 9.73 billion people and decline to 8.79 billion in 2100. [133] Some analysts have questioned the sustainability of further world population growth, highlighting the growing pressures on the environment, [134] [135] global food supplies, and energy resources. [136] [137] [138]

UN (medium variant – 2019 revision) and US Census Bureau (June 2015) estimates [139] [140]
YearUN est.
(millions)
DifferenceUSCB est.
(millions)
Difference
20056,5426,473
20106,9574156,866393
20157,3804237,256390
20207,7954157,643380
20258,1843908,007363
20308,5493648,341334
20358,8883398,646306
20409,1993118,926280
20459,4822839,180254
20509,7352539,408228
UN 2019 estimates and medium variant projections (in millions) [139]
YearWorldAsiaAfricaEuropeLatin America/CaribbeanNorthern AmericaOceania
20006,1443,741 (60.9%)811 (13.2%)726 (11.8%)522 (8.5%)312 (5.1%)31 (0.5%)
20056,5423,978 (60.8%)916 (14.0%)729 (11.2%)558 (8.5%)327 (5.0%)34 (0.5%)
20106,9574,210 (60.5%)1,039 (14.9%)736 (10.6%)591 (8.5%)343 (4.9%)37 (0.5%)
20157,3804,434 (60.1%)1,182 (16.0%)743 (10.1%)624 (8.5%)357 (4.8%)40 (0.5%)
20207,7954,641 (59.5%)1,341 (17.2%)748 (9.6%)654 (8.4%)369 (4.7%)43 (0.6%)
20258,1844,823 (58.9%)1,509 (18.4%)746 (9.1%)682 (8.3%)380 (4.6%)45 (0.6%)
20308,5494,974 (58.2%)1,688 (19.8%)741 (8.7%)706 (8.3%)391 (4.6%)48 (0.6%)
20358,8885,096 (57.3%)1,878 (21.1%)735 (8.3%)726 (8.2%)401 (4.5%)50 (0.6%)
20409,1995,189 (56.4%)2,077 (22.6%)728 (7.9%)742 (8.1%)410 (4.5%)53 (0.6%)
20459,4825,253 (55.4%)2,282 (24.1%)720 (7.6%)754 (8.0%)418 (4.4%)55 (0.6%)
20509,7355,290 (54.3%)2,489 (25.6%)711 (7.3%)762 (7.8%)425 (4.4%)57 (0.6%)
20559,9585,302 (53.2%)2,698 (27.1%)700 (7.0%)767 (7.7%)432 (4.3%)60 (0.6%)
206010,1525,289 (52.1%)2,905 (28.6%)689 (6.8%)768 (7.6%)439 (4.3%)62 (0.6%)
206510,3185,256 (51.0%)3,109 (30.1%)677 (6.6%)765 (7.4%)447 (4.3%)64 (0.6%)
207010,4595,207 (49.8%)3,308 (31.6%)667 (6.4%)759 (7.3%)454 (4.3%)66 (0.6%)
207510,5775,143 (48.6%)3,499 (33.1%)657 (6.2%)750 (7.1%)461 (4.4%)67 (0.6%)
208010,6745,068 (47.5%)3,681 (34.5%)650 (6.1%)739 (6.9%)468 (4.4%)69 (0.7%)
208510,7504,987 (46.4%)3,851 (35.8%)643 (6.0%)726 (6.8%)474 (4.4%)71 (0.7%)
209010,8104,901 (45.3%)4,008 (37.1%)638 (5.9%)711 (6.6%)479 (4.4%)72 (0.7%)
209510,8524,812 (44.3%)4,152 (38.3%)634 (5.8%)696 (6.4%)485 (4.5%)74 (0.7%)
210010,8754,719 (43.4%)4,280 (39.4%)630 (5.8%)680 (6.3%)491 (4.5%)75 (0.7%)

Mathematical approximations

In 1975, Sebastian von Hoerner proposed a formula for population growth which represented hyperbolic growth with an infinite population in 2025. [141] The hyperbolic growth of the world population observed until the 1970s was later correlated to a non-linear second-order positive feedback between demographic growth and technological development. This feedback can be described as follows: technological advance → increase in the carrying capacity of land for people → demographic growth → more people → more potential inventors → acceleration of technological advance → accelerating growth of the carrying capacity → faster population growth → accelerating growth of the number of potential inventors → faster technological advance → hence, the faster growth of the Earth's carrying capacity for people, and so on. [142] The transition from hyperbolic growth to slower rates of growth is related to the demographic transition.

According to the Russian demographer Sergey Kapitsa, [143] the world population grew between 67,000 BC and 1965 according to the following formula:

where

N is current population,
T is the current year,
C = (1.86 ± 0.01)·1011,
T0 = 2007 ± 1,
= 42 ± 1.

Years for world population to double

According to linear interpolation and extrapolation of UNDESA population estimates, the world population has doubled, or will double, in the years listed in the tables below (with two different starting points). During the 2nd millennium, each doubling took roughly half as long as the previous doubling, fitting the hyperbolic growth model mentioned above. However, after 2024, it is unlikely that there will be another doubling of the global population in the 21st century. [144]

Historic chart showing the periods of time the world population has taken to double, from 1700 to 2000 Population-doubling.svg
Historic chart showing the periods of time the world population has taken to double, from 1700 to 2000
Starting at 500 million
Population
(in billions)
0.5124816
Year15001804192719742022n/a
Years elapsed3041234748
Starting at 375 million
Population
(in billions)
0.3750.751.53612
Year11711715188119601999c.2100 [145]
Years elapsed5441667939c.100+

Number of humans who have ever lived

The total number of humans who have ever lived is estimated to be approximately 100 billion. Such estimates can only be rough approximations, as even modern population estimates are subject to uncertainty of around 3% to 5%. [14] Kapitsa (1996) cites estimates ranging between 80 and 150 billion. [146] The PRB puts the figure at 117 billion as of 2020, estimating that the current world population is 6.7% of all the humans who have ever lived. [147] Haub (1995) prepared another figure, updated in 2002 and 2011; the 2011 figure was approximately 107 billion. [148] [149] [150] Haub characterized this figure as an estimate that required "selecting population sizes for different points from antiquity to the present and applying assumed birth rates to each period". [149]

Robust population data only exist for the last two or three centuries. Until the late 18th century, few governments had ever performed an accurate census. In many early attempts, such as in Ancient Egypt and the Persian Empire, the focus was on counting merely a subset of the population for purposes of taxation or military service. [151] Thus, there is a significant margin of error when estimating ancient global populations.

Pre-modern infant mortality rates are another critical factor for such an estimate; these rates are very difficult to estimate for ancient times due to a lack of accurate records. Haub (1995) estimates that around 40% of those who have ever lived did not survive beyond their first birthday. Haub also stated that "life expectancy at birth probably averaged only about ten years for most of human history", [149] which is not to be mistaken for the life expectancy after reaching adulthood. The latter equally depended on period, location and social standing, but calculations identify averages from roughly 30 years upward.

The National Institute of Corrections estimates that that the number of people who have ever lived will rise to 121 billion by 2050, 4 billion more than their 2021 estimate. [152]

Human population as a function of food availability

Individuals from a wide range of academic fields and political backgrounds have proposed that, like all other animal populations, any human population (and, by extension, the world population) predictably grows and shrinks according to available food supply, growing during an abundance of food and shrinking in times of scarcity. [153] This idea may run counter to the popular thinking that, as population grows, food supply must also be increased to support the growing population; instead, the claim here is that growing population is the result of a growing food supply. Notable proponents of this notion include: agronomist and insect ecologist David Pimentel, [154] behavioral scientist Russell Hopfenberg (the former two publishing a study on the topic in 2001), [155] anthropologist and activist Virginia Abernethy, [156] ecologist Garrett Hardin, [157] science writer and anthropologist Peter Farb, journalist Richard Manning, [158] environmental biologist Alan D. Thornhill, [159] cultural critic and writer Daniel Quinn, [160] and anarcho-primitivist John Zerzan. [161]

Scientists generally acknowledge that at least one significant factor contributing to population growth (or overpopulation) is that as agriculture advances in creating more food, the population consequently increasesthe Neolithic Revolution and Green Revolution often specifically provided as examples of such agricultural breakthroughs. [162] [163] [164] [165] [166] [167] Furthermore, certain scientific studies do lend evidence to food availability in particular being the dominant factor within a more recent timeframe. [168] [169] [154] Other studies take it as a basic model from which to make broad population conjectures. [162] The idea became taboo following the United Nations' 1994 International Conference on Population and Development, where framing human population growth as negatively impacting the natural environment became regarded as "anti-human". [170]

Most human populations throughout history validate this theory, as does the overall current global population. Populations of hunter-gatherers fluctuate in accordance with the amount of available food. The world human population began consistently and sharply to rise, and continues to do so, after sedentary agricultural lifestyles became common due to the Neolithic Revolution and its increased food supply. [171] [164] [167] This was, subsequent to the Green Revolution starting in the 1940s, followed by even more severely accelerated population growth. Often, wealthier countries send their surplus food resources to the aid of starving communities; however, some proponents of this theory argue that this seemingly beneficial strategy only results in further harm to those communities in the long run. Anthropologist Peter Farb, for example, has commented on the paradox that "intensification of production to feed an increased population leads to a still greater increase in population." [172] Environmental writer Daniel Quinn has also focused on this phenomenon, which he calls the "food race", coining a term he felt was comparable, in terms of both escalation and potential catastrophe, to the nuclear arms race.

Criticism of this theory can come from multiple angles, for example by demonstrating that human population is not solely an effect of food availability, but that the situation is more complex. For instance, other relevant factors that can increase or limit human population include fresh water availability, arable land availability, energy consumed per person, heat removal, forest products, and various nonrenewable resources like fertilizers. [173] Another criticism is that, in the modern era, birth rates are lowest in the developed nations, which also have the highest access to food. In fact, some developed countries have both a diminishing population and an abundant food supply. The United Nations projects that the population of 51 countries or areas, including Germany, Italy, Japan, and most of the states of the former Soviet Union, is expected to be lower in 2050 than in 2005. [174] This shows that, limited to the scope of the population living within a single given political boundary, particular human populations do not always grow to match the available food supply. However, the global population as a whole still grows in accordance with the total food supply and many of these wealthier countries are major exporters of food to poorer populations, so that, according to Hopfenberg and Pimentel's 2001 research, "it is through exports from food-rich to food-poor areas... that the population growth in these food-poor areas is further fueled. [154] Their study thus suggests that human population growth is an exacerbating feedback loop in which food availability creates a growing population, which then causes the misimpression that food production must be consequently expanded even further. [175]

Regardless of criticisms against the theory that population is a function of food availability, the human population is, on the global scale, undeniably increasing, [176] as is the net quantity of human food produced—a pattern that has been true for roughly 10,000 years, since the human development of agriculture. The fact that some affluent countries demonstrate negative population growth fails to discredit the theory as a whole, since the world has become a globalized system with food moving across national borders from areas of abundance to areas of scarcity. Hopfenberg and Pimentel's 2001 findings support both this [154] and Daniel Quinn's direct accusation, in the early 2010s, that "First World farmers are fueling the Third World population explosion". [177]

See also

Lists:

Historical:

Explanatory notes

  1. This is by total speakers, not first-language or native speakers.
  1. Excludes Mexico, Central America and the Caribbean, which are included here under Latin America.
  2. The Antarctic Treaty System limits the nature of national claims in Antarctica. Of the territorial claims in Antarctica, the Ross Dependency has the largest population.
  3. Has limited international recognition as a country. Area for the purposes of these calculations is that claimed, not controlled, by the State of Palestine.
  4. Has limited international recognition as a country. Area for the purposes of these calculations is that controlled, not claimed, by Taiwan.

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References

Citations

  1. 1 2 "World Population Prospects 2022, Graphs / Profiles". United Nations Department of Economic and Social Affairs, Population Division. 2022.
  2. Kight, Stef W.; Lysik, Tory (14 November 2022). "The human race at 8 billion". Axios . Retrieved 15 November 2022.
  3. Jean-Noël Biraben (1980), "An Essay Concerning Mankind's Evolution". Population, Selected Papers. Vol. 4. pp. 1–13. Original paper in French:(b) Jean-Noël Biraben (1979)."Essai sur l'évolution du nombre des hommes". Population. Vol. 34 (no. 1). pp. 13–25.
  4. "World Population Prospects". United Nations. Archived from the original on 19 September 2016. Retrieved 15 September 2016.
  5. 1 2 3 "World Population Prospects, Standard Projections, Archive, 2019 Revision". United Nations Department of Economic and Social Affairs, Population Division. 2019.
  6. Ortiz-Ospina, Esteban; Roser, Max (9 May 2013). "World Population Growth". Our World in Data. Archived from the original on 13 October 2016. Retrieved 13 October 2016.
  7. Cave, Damien; Bubola, Emma; Sang-Hun, Choe (22 May 2021). "Long Slide Looms for World Population, With Sweeping Ramifications". The New York Times. ISSN   0362-4331. Archived from the original on 28 December 2021. Retrieved 23 May 2021.
  8. 1 2 "World Population Prospects 2019, Births file". United Nations Department of Economic and Social Affairs. 2019.
  9. 1 2 "World Population Prospects 2019, Deaths file". United Nations Department of Economic and Social Affairs. 2019.
  10. 1 2 "World", The World Factbook, Central Intelligence Agency, 19 October 2021, retrieved 1 November 2021
  11. the compound "world population" becomes common from c. the 1930s, adapted from early 20th-century "world's population"; pre-20th century authors use "population of the world".
  12. "The population of the world, which Sir W. P. in 1682, stated at only 320 millions, has been estimated by some writers at about 730 million, by others, at upwards of 900 million; Mr. Wallace, of Edinburgh, conjectured it might amount to 1 billion, and this number has since generally been adopted who have noticed the subject;" The Monthly Magazine 4 (July–December 1797), p. 167.
  13. 600 million: Simon Gray, The Happiness of States (1818), p. 356 Archived 6 June 2019 at the Wayback Machine . 800 million: Gordon Hall, Samuel Newell, The Conversion of the World (1818), p. 10 Archived 6 June 2019 at the Wayback Machine . 800 to 1000 million: John Redman Coxe, Considerations Respecting the Recognition of Friends in Another World (1845), p. 21 (footnote with references).
  14. 1 2 "[E]ven recent demographic data is accurate only from 3 to 5%, although in demography traditionally more digits are indicated than those having a meaning. This is partially due to the ethical difficulty in rounding off numbers that supposedly represent real people, officially counted during a census". Sergei P. Kapitza, "The phenomenological theory of world population growth", Physics-Uspekhi 39(1) 57–71 (1996).
  15. Luc-Normand Tellier (2009). Urban world history: an economic and geographical perspective. p. 26. ISBN   978-2-7605-1588-8.
  16. Ralph Thomlinson, 1975, Demographic Problems: Controversy over population control, 2nd Ed., Dickenson Publishing Company, Ecino, CA, ISBN   0-8221-0166-1.
  17. Dr. Kenneth W. Harl (1998). "Population estimates of the Roman Empire". Tulane.edu. Archived from the original on 7 May 2016. Retrieved 8 December 2012.
  18. "Plague, Plague Information, Black Death Facts, News, Photos". National Geographic. Archived from the original on 22 July 2013. Retrieved 3 November 2008.
  19. "History of Europe – Demographic and agricultural growth". Encyclopædia Britannica. 2012. Archived from the original on 20 December 2012. Retrieved 17 December 2012.
  20. "Historical Estimates of World Population". Census.gov. Archived from the original on 9 July 2012. Retrieved 12 November 2016.
  21. 1 2 Biraben, Jean-Noël (1979). "Essai sur l'évolution du nombre des hommes". Population. 34 (1): 13–25. doi:10.2307/1531855. JSTOR   1531855. S2CID   143406315 . Retrieved 11 February 2022.
  22. Jay, Peter (17 July 2000). "A Distant Mirror". TIME Europe. 156 (3). Archived from the original on 25 July 2008. Retrieved 9 August 2014.
  23. Horst R. Thieme (2003). Mathematics in population biology. Princeton University Press. p. 285. ISBN   978-0-691-09291-1.
  24. Graziella Caselli; Gillaume Wunsch & Jacques Vallin (2005). Demography: Analysis and Synthesis, Four Volume Set: A Treatise in Population. Academic Press. p. 34. ISBN   978-0-12-765660-1.
  25. 1 2 Nishijima, Sadao (1986), "The economic and social history of Former Han", in Twitchett, Denis; Loewe, Michael, Cambridge History of China: Volume I: the Ch'in and Han Empires, 221 B.C. – A.D. 220, Cambridge: Cambridge University Press, pp 595–96.
  26. "Qing China's Internal Crisis: Land Shortage, Famine, Rural Poverty". Columbia University: Asia for Educators. 2009. Archived from the original on 8 July 2011. Retrieved 9 July 2013.
  27. "History of Europe – Demographics". Encyclopædia Britannica. Archived from the original on 23 July 2013. Retrieved 9 July 2013.
  28. "China's Population: Readings and Maps". Columbia University: East Asian Curriculum Project. Archived from the original on 19 July 2011. Retrieved 18 December 2012.
  29. "The Columbian Exchange". University of North Carolina. Archived from the original on 26 July 2011. Retrieved 18 December 2012.
  30. Collingham, Lizzie (2006). Vindaloo: the Portuguese and the chilli pepper. Curry: A Tale of Cooks and Conquerors. Oxford: Oxford University Press. pp. 47–73. ISBN   978-0-19-988381-3.
  31. "Super-Sized Cassava Plants May Help Fight Hunger in Africa". Ohio State University. 24 May 2006. Archived from the original on 8 December 2013. Retrieved 9 July 2013.
  32. Brabazon, James (2000). Albert Schweitzer: a biography . Syracuse University Press. p.  242. ISBN   978-0-8156-0675-8.
  33. "U.S. News & World Report: How many people were here before Columbus? Pick a number". 18 August 1997. Archived from the original on 5 March 2008. Retrieved 9 August 2019.
  34. Snow, D. R (16 June 1995). "Microchronology and Demographic Evidence Relating to the Size of Pre-Columbian North American Indian Populations". Science . 268 (5217): 1601–1604. Bibcode:1995Sci...268.1601S. doi:10.1126/science.268.5217.1601. PMID   17754613. S2CID   8512954.
  35. Arthur C. Aufderheide; Conrado Rodríguez-Martín & Odin Langsjoen (1998). The Cambridge encyclopedia of human paleopathology . Cambridge University Press. p.  205. ISBN   978-0-521-55203-5.
  36. "The Story Of... Smallpox – and other Deadly Eurasian Germs". Public Broadcasting Service. 2005. Archived from the original on 29 January 2018. Retrieved 24 April 2013.
  37. Austin Alchon, Suzanne (2003). A pest in the land: new world epidemics in a global perspective. University of New Mexico Press. p. 31. ISBN   978-0-8263-2871-7. Archived from the original on 18 May 2016. Retrieved 15 November 2015.
  38. "World Demographics Profile 2012". Index Mundi. Archived from the original on 7 June 2012. Retrieved 22 May 2012.
  39. "By 2050, 70% of the world's population will be urban. Is that a good thing?". Fast Co. Design. 2012. Archived from the original on 12 May 2012. Retrieved 1 May 2012.
  40. Population crises and cycles in history – A review by Claire Russell and W.M.S. Russell, Vicnet.net.au, archived from the original on 5 April 2011, retrieved 26 March 2015
  41. Buer, Mabel C. (1926). Health, Wealth and Population in the Early Days of the Industrial Revolution. London: George Routledge & Sons. p.  30. ISBN   978-0-415-38218-2.
  42. "The Foundling Hospital". BBC History. 5 October 2012. Archived from the original on 17 June 2013. Retrieved 22 April 2013.
  43. "Modernization – Population Change". Encyclopædia Britannica. Archived from the original on 6 April 2009. Retrieved 6 February 2013.
  44. Graziella Caselli; Gillaume Wunsch & Jacques Vallin (2005). Demography: Analysis and Synthesis, Four Volume Set: A Treatise in Population. Academic Press. p. 42. ISBN   978-0-12-765660-1.
  45. "Victorian Medicine – From Fluke to Theory". BBC History. 1 February 2002. Archived from the original on 5 March 2013. Retrieved 17 February 2013.
  46. "A portrait of Britain in 2031". The Independent. 24 October 2007. Archived from the original on 9 December 2017. Retrieved 17 February 2013.
  47. "UK population breaks through 60m". BBC News. 24 August 2006. Archived from the original on 8 February 2009. Retrieved 14 April 2012.
  48. "US population through history". About.com. Archived from the original on 13 January 2012. Retrieved 14 April 2012.
  49. Jay Winter, Emmanuel Sivan (2000). War and Remembrance in the Twentieth Century. Cambridge University Press. p. 64. ISBN   978-0521794367. Archived from the original on 4 September 2015. Retrieved 20 July 2015.
  50. Mark Harrison (2002). Accounting for War: Soviet Production, Employment, and the Defence Burden, 1940–1945. Cambridge University Press. p. 167. ISBN   978-0-521-89424-1.
  51. "Vladimir Putin vows to reverse Russian population decline". The Daily Telegraph . 13 February 2012. Archived from the original on 24 April 2012. Retrieved 13 April 2012.
  52. "Russia's Population Decline Said To Have 'Stopped'". Radio Free Europe/Radio Liberty. 27 May 2013. Retrieved 15 June 2013.
  53. Schran, Peter (1978). "China's demographic evolution 1850–1953 reconsidered". The China Quarterly. 75 (75): 639–646. doi:10.1017/S0305741000042594. JSTOR   652987. S2CID   154294204.
  54. "Reintegrating India with the World Economy" (PDF). Peterson Institute for International Economics. 2003. Archived (PDF) from the original on 4 March 2012. Retrieved 8 November 2012.
  55. "The World Factbook – Central Intelligence Agency". cia.gov. Archived from the original on 27 September 2011. Retrieved 8 January 2017.
  56. "Java (island, Indonesia)". Encyclopædia Britannica. Archived from the original on 10 November 2022. Retrieved 16 November 2022.
  57. Jorge Durand (March 2004). "From Traitors to Heroes: 100 Years of Mexican Migration Policies". University of Guadalajara. Archived from the original on 5 May 2011. Retrieved 16 July 2013.
  58. "Population and Housing Census: Mexico 2010" (PDF). University of Minnesota. 3 March 2011. Archived (PDF) from the original on 3 November 2013. Retrieved 16 July 2013.
  59. Heinsohn, Gunnar (7 January 2008). "Kenya's Violence: Exploding population". The New York Times. Archived from the original on 15 July 2014. Retrieved 7 July 2013.
  60. Nations, United. "World population to reach 8 billion on 15 November 2022". United Nations. Retrieved 14 November 2022.
  61. "The World at Six Billion: Introduction" (PDF). United Nations. 1999. Archived from the original (PDF) on 5 February 2016. Retrieved 14 July 2013.
  62. "U.S. Census Bureau – World POPClock Projection". July 2013. Archived from the original on 18 November 2011. Retrieved 18 February 2018. The number on this page is automatically updated daily.
  63. "Population seven billion: UN sets out challenges". BBC News. 26 October 2011. Archived from the original on 26 October 2011. Retrieved 27 October 2011.
  64. Coleman, Jasmine (31 October 2011). "World's 'seven billionth baby' is born". The Guardian. London. Archived from the original on 30 September 2013. Retrieved 31 October 2011.
  65. "7 billion people is a 'serious challenge". United Press International. 31 October 2011. Archived from the original on 3 November 2011. Retrieved 9 November 2011.
  66. 1 2 "World set to reach 8 billion people on 15 November 2022". United Nations Population Fund. Retrieved 8 October 2022.
  67. 1 2 "World Population Prospects 2019, Total Population – Both Sexes file, Medium Variant tab". United Nations Department of Economic and Social Affairs. 2019.
  68. 1 2
  69. 1 2 "Key Findings" (PDF). Long-Range Population Projections. New York: United Nations: Department of Economic and Social Affairs. 2003. Retrieved 3 July 2010.{{cite book}}: |work= ignored (help)
  70. "Total fertility estimates, 1950–2010". UN Population Division. April 2011. Archived from the original on 7 June 2012. Retrieved 14 June 2012.
  71. "World Population Prospects, the 2008 Revision – Frequently Asked Questions". Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat. 10 November 2010. Archived from the original on 24 February 2015. Retrieved 26 March 2015.
  72. "World population to reach 8 billion this year, as growth rate slows" Archived 16 July 2022 at the Wayback Machine , UN News, 11 July 2022.
  73. "World Health Statistics 2016: Monitoring health for the SDGs Annex B: tables of health statistics by country, WHO region and globally" (PDF). World Health Organization. 2016. p. 110. Archived (PDF) from the original on 17 May 2018. Retrieved 3 August 2018.
  74. 1 2 "World - The World Factbook". CIA World Fact Book. Central Intelligence Agency. 20 February 2024. Retrieved 24 February 2024.
  75. Janneh, Abdoulie (April 2012). "General debate on national experience in population matters: adolescents and youth" (PDF). United Nations Economic Commission for Africa. Archived (PDF) from the original on 10 November 2013. Retrieved 19 February 2014.
  76. "WHO, 2020 Life Expectancy". World Health Organization. Retrieved 27 July 2022.
  77. "Children per woman". Our World in Data. Retrieved 1 November 2021.
  78. "Global weight gain more damaging than rising numbers". BBC. 18 June 2012. Archived from the original on 4 February 2013. Retrieved 12 February 2013.
  79. "World Economic Outlook (October 2021)". Imf.org. Retrieved 1 November 2021.
  80. "Poverty headcount ratio at $1.90 a day (2011 PPP) (% of population) | Data". World Bank. Retrieved 1 November 2021.
  81. Food and Agriculture Organization of the United Nations, The State of Food Insecurity in the World Archived 11 June 2014 at the Wayback Machine . WorldHunger.org. 2012. Retrieved 26 April 2012.
  82. "Literacy Rate, Adult Total (% of people ages 15 and above)". The World Bank. September 2021.
  83. "Number of internet and social media users worldwide as of January 2024". Statista. 31 January 2024. Archived from the original on 12 February 2024.
  84. Chin, Josh (4 March 2011). "World's Most Typical Person: Han Chinese Man". Wall Street Journal. Archived from the original on 6 June 2019. Retrieved 18 November 2011.
  85. Ghosh, Iman (15 February 2020). "Ranked: The 100 Most Spoken Languages Around the World". Visual Capitalist. Retrieved 1 November 2021.
  86. "Religious Composition by Country, 2010–2050". Pew Research Center. 2 April 2015.
  87. "Regions in the world by population (2020)" . Retrieved 5 October 2020.
  88. 1 2 "Antarctica". The World Factbook. 19 June 2014. Retrieved 18 March 2015.
  89. United Nations. Department of Economic and Social Affairs. World Population Prospects 2022. Summary of Results (PDF). New York.
  90. "USA: Combined Metropolitan Areas". CityPopulation.de. August 2021. Retrieved 19 November 2021.
  91. 1 2 "Spotlight on family planning as India surpasses China as world's most populous country". france24.com. 14 April 2023. Retrieved 14 April 2023.
  92. "2023年国民经济回升向好 高质量发展扎实推进" [Economy continues to recover in 2023, high-quality development progress steadily]. National Bureau of Statistics of China (in Chinese). Retrieved 17 January 2024.
  93. "Population Clock". Census.gov. Archived from the original on 17 November 2015. Retrieved 18 April 2020.
  94. "Mid Year Population (Thousand People)". Badan Pusat Statistik – Indonesia . Retrieved 22 November 2023.
  95. 1 2 "World Population Prospects 2019". United Nations.
  96. "IBGE | Projeção da população". Ibge.gov.br. Archived from the original on 4 February 2020. Retrieved 22 November 2019.
  97. "Monthly Statidtical Bulletin – Bangladesh" (PDF). 2022-05-12-10-42-55414488d843db66462b5410cb439c22.pdf. Bangladesh Bureau of Statistics. February 2022. Archived (PDF) from the original on 8 June 2022. Retrieved 8 June 2022.
  98. Times, The Moscow (30 May 2022). "Russia Reports 147M Population in 2021". Moscow Times. Retrieved 2 June 2022.
  99. "World Population Day: India will overtake China in 2023, says the UN". bbc.com. 11 July 2022. Retrieved 14 April 2023.
  100. 1 2 "World Population Prospects: The 2015 Revision". UN Population Division. Archived from the original on 22 December 2015. Retrieved 19 January 2016.. Linked to at Download Files, where it states that the figures are for 1 July of the given year.
  101. 1 2 "Countries – The World Factbook". cia.gov. Retrieved 15 November 2022.
  102. "UNData app". United Nations. Retrieved 15 November 2022.
  103. 1 2 Demetriou, Danielle (17 April 2013). "Japan's population suffers biggest fall in history". The Daily Telegraph. London. Archived from the original on 21 May 2013. Retrieved 22 July 2013.
  104. "World Population Clock (under World Pop Milestone section)". Worldometer. 2022.
  105. "The limits of a Green Revolution?". BBC News. 29 March 2007. Archived from the original on 28 July 2011. Retrieved 1 August 2010.
  106. "The Real Green Revolution". Energybulletin.net. Archived from the original on 22 April 2008. Retrieved 1 August 2010.
  107. Roser, Max (18 June 2019). "Two centuries of rapid global population growth will come to an end". Our World in Data.
  108. Ron Nielsen (2006). The Little Green Handbook. New York: Picador. ISBN   978-0-312-42581-4.
  109. "UN population estimates and projections, database query, August 2009". United Nations. 11 March 2009. Archived from the original on 19 August 2010. Retrieved 1 August 2010.
  110. Randers, Jorgen (2012). 2052: A Global Forecast for the Next Forty Years. Vermont: Chelsea Green Publishing. p. 62.
  111. World population to keep growing this century, hit 11 billion by 2100 Archived 4 December 2016 at the Wayback Machine . UWToday. 18 September 2014
  112. "World Population by Year". Worldometers.info. Retrieved 18 July 2023.
  113. 1 2 "World Population Prospects: The 2008 Revision" (PDF). Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat. June 2009. Archived (PDF) from the original on 19 March 2013. Retrieved 20 June 2013.
  114. "The World at Six Billion". United Nations. 12 October 1999. Archived from the original on 9 July 2013. Retrieved 1 August 2010.
  115. "Population Growth over Human History". University of Michigan. 4 January 2006. Archived from the original on 24 July 2011. Retrieved 9 March 2013.
  116. 1 2 Figures include the former Soviet countries in Europe. Caselli, Graziella; Gillaume Wunsch; Jacques Vallin (20 December 2005). Demography: Analysis and Synthesis, Four Volume Set: A Treatise in Population. Academic Press. p. 42. ISBN   978-0-12-765660-1.
  117. 1 2 "UN report – 2004 data" (PDF). Archived from the original (PDF) on 5 February 2016. Retrieved 1 August 2010.
  118. "World Population Prospects The 2015 Revision". Archived from the original (PDF) on 20 March 2014.
  119. "The World at Six Billion". UN Population Division. Archived from the original on 5 March 2016., Table 2
  120. Fewer than 15,000 individuals, according to the Toba catastrophe theory, though this theory has been criticized by some scientists. See: "Toba super-volcano catastrophe idea "dismissed"". BBC News. 30 April 2013. Archived from the original on 7 January 2015. Retrieved 21 March 2015.
  121. An approximation based on figures from different sources as listed at the US Census Bureau's Historical Estimates of World Population Archived 2 May 2019 at the Wayback Machine ; see also * Kremer, Michael (1993). "Population Growth and Technological Change: One Million B.C. to 1990". The Quarterly Journal of Economics. 108 (3): 681–716. doi:10.2307/2118405. JSTOR   2118405.
  122. An approximation based on figures from different sources as listed at the US Census Bureau's Total Midyear Population for the World: 1950–2050 Archived 21 May 2017 at the Wayback Machine
  123. "Notes on the World POPClock and World Vital Events". US Census Bureau. Archived from the original on 2 October 2013. Retrieved 12 February 2013.
  124. "World Population Prospects 2019, Crude Birth Rate file". United Nations Department of Economic and Social Affairs. 2019.
  125. "World Population Prospects 2019, Crude Death Rate file". United Nations Department of Economic and Social Affairs. 2019.
  126. "World Population Prospects, the 2012 Revision – "Low variant" and "High variant" values". UN. 2012. Archived from the original on 1 July 2014. Retrieved 15 June 2013.
  127. "World population projected to reach 9.6 billion by 2050 – UN report". UN News Centre. 14 June 2013. Archived from the original on 23 August 2013. Retrieved 16 June 2013.
  128. "A model predicts that the world's populations will stop growing in 2050". ScienceDaily.com. 4 April 2013. Archived from the original on 2 January 2020. Retrieved 3 June 2013.
  129. Carrington, Damien (18 September 2014). "World population to hit 12bn in 2100 – with 70% chance of continuous rise". The Guardian. Archived from the original on 20 September 2014. Retrieved 21 September 2014.
  130. Gerland, P.; Raftery, A. E.; Ev Ikova, H.; Li, N.; Gu, D.; Spoorenberg, T.; Alkema, L.; Fosdick, B. K.; Chunn, J.; Lalic, N.; Bay, G.; Buettner, T.; Heilig, G. K.; Wilmoth, J. (14 September 2014). "World population stabilization unlikely this century". Science. 346 (6206). AAAS: 234–7. Bibcode:2014Sci...346..234G. doi:10.1126/science.1257469. ISSN   1095-9203. PMC   4230924 . PMID   25301627.
  131. "World Population Prospects 2019: Highlights" (PDF). Archived (PDF) from the original on 3 July 2019. Retrieved 8 July 2019.
  132. Silk, John (21 December 2019). "World's population to hit 7.75 billion in 2019". Deutsche Welle . Retrieved 17 July 2020.
  133. "World population in 2100 could be 2 billion below UN forecasts, study suggests". The Guardian. 15 July 2020. Retrieved 15 July 2020.
  134. Stokstad, Erik (5 May 2019). "Landmark analysis documents the alarming global decline of nature". Science . AAAS . Retrieved 19 July 2020. Driving these threats are the growing human population, which has doubled since 1970 to 7.6 billion, and consumption. (Per capita of use of materials is up 15% over the past 5 decades.)
  135. Crist, Eileen; Ripple, William J.; Ehrlich, Paul R.; Rees, William E.; Wolf, Christopher (2022). "Scientists' warning on population" (PDF). Science of the Total Environment . 845: 157166. Bibcode:2022ScTEn.845o7166C. doi:10.1016/j.scitotenv.2022.157166. PMID   35803428. S2CID   250387801.
  136. Peter P. Rogers; Kazi F. Jalal & John A. Boyd (2008). An Introduction To Sustainable Development. Earthscan. p. 53. ISBN   978-1849770477.
  137. "Overpopulation's Real Victim Will Be the Environment". Time. 26 October 2011. Archived from the original on 18 February 2013. Retrieved 18 February 2013.
  138. Zehner, Ozzie (2012). Green Illusions. Lincoln and London: University of Nebraska Press. pp. 187–331. Archived from the original on 29 November 2019. Retrieved 10 April 2020.
  139. 1 2 "World Population Prospects: The 2019 Revision" (XLS). Population Division of the Department of Economic and Social Affairs of the United Nations Secretariat. June 2019. Retrieved 8 July 2019.
  140. "World Population – Total Midyear Population for the World: 1950–2050". Census.gov. July 2015. Archived from the original on 21 May 2017. Retrieved 7 March 2016.
  141. Sebastien von Hoerner (1975). "Population Explosion and Interstellar Expansion". Journal of the British Interplanetary Society. 28 (28): 691–712. Bibcode:1975JBIS...28..691V.
  142. Introduction to Social Macrodynamics. Archived 10 February 2012 at the Wayback Machine . Andrey Korotayev et al. For a rigorous mathematical analysis of this issue, see "A Compact Mathematical Model of the World System Economic and Demographic Growth, 1 CE – 1973 CE". Archived 17 February 2019 at the Wayback Machine .
  143. Kapitsa, Sergei P. (1996). "The phenomenological theory of world population growth". Physics-Uspekhi. 39 (1): 57–71. Bibcode:1996PhyU...39...57K. doi:10.1070/pu1996v039n01abeh000127. S2CID   250877833. Archived from the original on 11 May 2009. Retrieved 26 July 2013.
  144. Lutz, Wolfgang; Sanderson, Warren; Scherbov, Sergei (19 June 1997). "Doubling of world population unlikely" (PDF). Nature. 387 (6635): 803–805. Bibcode:1997Natur.387..803L. doi:10.1038/42935. PMID   9194559. S2CID   4306159.
  145. "No way to stop human population growth?". www.science.org.
  146. Sergei P. Kapitza, "The phenomenological theory of world population growth", Physics-Uspekhi 39(1) 57–71 (1996), citing K. M. Weiss, Human Biology 56637 (1984) and N. Keyfitz, Applied Mathematical Demography (New York: Wiley, 1977).
  147. "How Many People Have Ever Lived on Earth?". PRB. Retrieved 1 November 2021.
  148. Curtin, Ciara (1 March 2007). "Fact or Fiction?: Living People Outnumber the Dead". Scientific American. 297 (3). Scientific American, Inc. (published September 2007): 126. Bibcode:2007SciAm.297c.126C. doi:10.1038/scientificamerican0907-126. PMID   17784634 . Retrieved 4 August 2008.Note: text of paper publication slightly different from text of on-line publication.
  149. 1 2 3 Haub, Carl (November–December 2002). "How Many People Have Ever Lived on Earth?" (PDF). Population Today. 30 (8). Population Reference Bureau: 3–4. Archived (PDF) from the original on 12 August 2011. Retrieved 4 August 2008.
  150. Haub, Carl (October 2011). "How Many People Have Ever Lived on Earth?". Population Reference Bureau. Archived from the original on 24 April 2013. Retrieved 29 April 2013.
  151. Kuhrt, A. (1995). The Ancient Near East, c. 3000–330 BCE. Vol. 2. London: Routledge. p. 695.
  152. "How Many People Have Ever Lived on Earth?". National Institute of Corrections. Retrieved 4 March 2024.
  153. Bystroff, Chistopher (2021). "Footprints to singularity: A global population model explains late 20th century slow-down and predicts peak within ten years". PLoS ONE 16(5): e0247214. doi : 10.1371/journal.pone.0247214
  154. 1 2 3 4 Hopfenberg, Russell and Pimentel, David, "Human Population Numbers as a Function of Food Supply", Environment, Development and Sustainability, vol. 3, no. 1, March 2001, pp. 1–15
  155. "Human Carrying Capacity is Determined by Food Availability" (PDF). Russel Hopfenberg, Duke University . Archived from the original (PDF) on 21 September 2020. Retrieved 10 January 2023.
  156. Abernathy, Virginia, Population Politics ISBN   0-7658-0603-7
  157. Hardin, Garrett (1974). "Lifeboat Ethics: the Case Against Helping the Poor". Psychology Today. 8: 38–43.
  158. Manning, Richard (7 September 2011). "Richard Manning on the Green Revolution and the End of Cheap Oil" (Interview). Interviewed by Sally Erickson and Timothy Scott Bennett. Retrieved 15 October 2013 via YouTube.
  159. Food Production & Population Growth, video with Daniel Quinn and Alan Thornhill
  160. Quinn, Daniel, Ishmael Bantam/Turner, 1995, ISBN   0613080939
  161. Zerzan, John (2 April 2008). On Modernity and the Technosphere (Speech). Binghamton University.
  162. 1 2 Gilland, Bernard (2006). "Population, nutrition and agriculture". Population and Environment, 28(1), 1.
  163. Bocquet-Appel, Jean-Pierre (2011). "When the world's population took off: the springboard of the Neolithic Demographic Transition". Science, 333(6042), 560–561.
  164. 1 2 Li, Xiaoqiang; Dodson, John; Zhou, Jie; Zhou, Xinying (1 June 2009). "Increases of population and expansion of rice agriculture in Asia, and anthropogenic methane emissions since 5000BP". Quaternary International. Great Arc of Human Dispersal. 202 (1): 41–50. Bibcode:2009QuInt.202...41L. doi:10.1016/j.quaint.2008.02.009.
  165. Kopnina, Helen; Washington, Haydn (2016). "Discussing why population growth is still ignored or denied". Chinese Journal of Population Resources and Environment. 14 (2): 133–143. Bibcode:2016CJPSE..14..133K. doi:10.1080/10042857.2016.1149296. hdl: 1887/44662 . Archived from the original on 4 January 2023.
  166. "What Causes Overpopulation?" Euroscientist. Euroscience: "When agriculture advances, and it becomes easier to feed the population, it continues to grow."
  167. 1 2 "The Development of Agriculture". National Geographic. 2022.
  168. Cohen, Joel E. (1995). Population growth and earth's human carrying capacity. Science, 269(5222), 341–346.
  169. Fanta, V., Šálek, M., Zouhar, J., Sklenicka, P., & Storch, D. (2018). Equilibrium dynamics of European pre-industrial populations: the evidence of carrying capacity in human agricultural societies. Proceedings of the Royal Society B: Biological Sciences, 285(1871), 20172500.
  170. Henderson, Kirsten, & Loreau, Michel (2019). "An ecological theory of changing human population dynamics". People and Nature, 1(1), 32.
  171. GJ Armelagos, AH Goodman, KH Jacobs Population and environment – 1991 link.springer.com
  172. Farb, Peter: 1978, Humankind. Boston, Houghton Mifflin.
  173. Van Den Bergh, Jeroen, & Rietveld, Piet (2004). "Reconsidering the limits to world population: meta-analysis and meta-prediction". BioScience, 54(3), 195–204.
  174. Rosa, Daniele (2019). "Nel 2050 gli italiani saranno 20 milioni meno secondo l'Onu [Translation: In 2050 the Italians will be 20 million less, according to the UN]". Affaritaliani. Uomini & Affari Srl.
  175. Salmony, Steven E. (2006). "The Human Population: Accepting Species Limits". Environmental Health Perspectives, 114(1), A 17. doi : 10.1289/ehp.114-a17.
  176. Daniel Quinn (1996). The Story of B , pp. 304–305, Random House Publishing Group, ISBN   0553379011.
  177. Quinn, Daniel: "The Question (ID Number 122)". Retrieved October 2014 from "Archived copy". Archived from the original on 4 March 2016. Retrieved 18 October 2014.{{cite web}}: CS1 maint: archived copy as title (link).

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