Sergei P Kapitza, 'The phenomenological theory of world population growth', Learn how and when to remove this template message, List of countries and dependencies by population, List of countries and dependencies by population density, Institute for Health Metrics and Evaluation, sustainable limit to the world population, Global Assessment Report on Biodiversity and Ecosystem Services, List of sovereign states and dependencies by total fertility rate, List of countries by past and projected future population, List of countries by population growth rate, "World Development Indicators – Google Public Data Explorer", "World Population to Hit Milestone With Birth of 7 Billionth Person", "World Population Prospects, 2012 revision (697 million births from 1985–1990)", "World Population estimates by the US Census Bureau", "CIA, The World Factbook: Field Listing: Median Age", "World Population Prospects: The 2015 Revision", "Regions in the world by population (2020)", "Population estimates of the Roman Empire", "Plague, Plague Information, Black Death Facts, News, Photos", "History of Europe – Demographic and agricultural growth", "Historical Estimates of World Population", "Qing China's Internal Crisis: Land Shortage, Famine, Rural Poverty", "Super-Sized Cassava Plants May Help Fight Hunger in Africa", "U.S. News & World Report: How many people were here before Columbus? All on this page, one by one. At the dawn of agriculture, about 8000 B.C., the population of the world was approximately 5 million. It was another 123 years before it reached two billion in 1927, but it took only 33 years to reach three billion in 1960. World population is expected to reach 8 billion people in 2023 according to the United Nations (in 2026 according to the U.S. Census Bureau). [47] 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. [21], It is difficult for estimates to be better than rough approximations, as even modern population estimates are fraught with uncertainties on the order of 3% to 5%. Obviously, the UN data is based on estimates and can't be 100% accurate, so in all honesty nobody can possibly say with any degree of certainty on which day world population reached 7 billion (or any other exact number), let alone at what time. This statistic shows the most spoken languages in the world. [120][121] 2003 UN Population Division population projections for the year 2150 range between 3.2 and 24.8 billion. Mobile subscriptions are still growing faster than the world’s population. Asia is the most populous continent, with its 4.64 billion inhabitants accounting for 60% of the world population. 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. [183][184][185] 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".[184]. [22], 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. Robust population data only exist for the last two or three centuries. The latter equally depended on period, location and social standing, but calculations identify averages from roughly 30 years upward. Worldometer About FAQ Licensing Newsletter Contact. [177], Other academicians and public figures have pointed to the role of agriculture and agricultural productivity of increasing human carrying capacity, which results in population overshoot, as with any other species when their food supply experiences an increase, which in turn results in resource depletion and mass poverty and starvation in the case of humans. Africa has a population of around 1.3 billion people. Nishijima, Sadao (1986), "The economic and social history of Former Han", in Twitchett, Denis; Loewe, Michael. In an environment with unlimited natural resources, population size grows exponentially. [142], In 2004, a meta-analysis of 70 quantitative studies estimating a sustainable limit to the world population generated a meta-estimate of 7.7 billion people. [160][161] [170][171], A July 2017 study published in Environmental Research Letters argued that the most significant way individuals could mitigate their own carbon footprint is to have fewer children, followed by living without a vehicle, foregoing air travel, and adopting a plant-based diet. [119] The UN has issued multiple projections of future world population, based on different assumptions. Earth's capacity. 7 billion people on 1 page We recently reached 7 billion people in the world. The first humans had to deal with … "[40] 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. The question, “how many people can Earth support?” has been asked and answered many times. [137], In his 1798 work An Essay on the Principle of Population, the British scholar Thomas Malthus incorrectly predicted that continued population growth would exhaust the global food supply by the mid-19th century. [67] Thereafter, the global population reached four billion in 1974, five billion in 1987, six billion in 1999 and, according to the United States Census Bureau, seven billion in March 2012. It has been undertaken as a response to factors including high or increasing levels of poverty, environmental concerns, and religious reasons. [72] Projected figures vary depending on underlying statistical assumptions and the variables used in projection calculations, especially the fertility variable. There were around 1.3 billion native Chinese speakers a the time of survey. [29] The population of China decreased from 123 million in 1200 to 65 million in 1393,[30] presumably from a combination of Mongol invasions, famine, and plague. Most scholars believe that, without the Revolution, there would be greater levels of famine and malnutrition than the UN presently documents. According to the Russian demographer Sergey Kapitsa,[136] the world population grew between 67,000 BC and 1965 according to the following formula: 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). Is that a good thing? "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 millions, by others, at upwards of 900 millions; Mr. Wallace, of Edinburgh, conjectured it might amount to 1 billion, and this number has since generally been adopted who have noticed the subject;". Population, which had sort of fallen off the world’s agenda, remains a very important issue. [75][needs update], As of 2012, the global sex ratio is approximately 1.01 males to 1 female. [134] 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. One characteristic feature of exponential growth is the time a population takes to double in size. Others have estimated the number of human beings who have ever lived to be anywhere from 45 billion to 125 billion, with most estimates falling into the range of 90 to 110 billion humans. [15] Antarctica only has a very small, fluctuating population of about 1200 people based mainly in polar science stations. [77] The median age of the world's population was estimated to be 29.7 years in 2014,[79] and is expected to rise to 37.9 years by 2050. a net decrease in population over time), due to sub-replacement fertility rates. The tables below list the world's most densely populated countries, both in absolute terms and in comparison to their total populations. The greater number of men is possibly due to the significant sex imbalances evident in the Indian and Chinese populations. [27] The Black Death pandemic of the 14th century may have reduced the world's population from an estimated 450 million in 1340 to between 350 and 375 million in 1400;[28] it took 200 years for population figures to recover. Over the 8,000-year period up to 1 A.D. it grew to 200 million (some estimate 300 million or even 600, suggesting how imprecise population estimates of early historical periods can be), with a growth rate of under 0.05% per year. ", "Victorian Medicine – From Fluke to Theory", "Vladimir Putin vows to reverse Russian population decline", "Russia's Population Decline Said To Have 'Stopped, "Reintegrating India with the World Economy", "The World Factbook – Central Intelligence Agency", "From Traitors to Heroes: 100 Years of Mexican Migration Policies", "Population and Housing Census: Mexico 2010", "U.S. Census Bureau – World POPClock Projection", "Population seven billion: UN sets out challenges", "7 billion people is a 'serious challenge", "World Population Prospects, the 2008 Revision – Frequently Asked Questions", "World Health Statistics 2016: Monitoring health for the SDGs Annex B: tables of health statistics by country, WHO region and globally", "Sex-ratio imbalance in Asia: Trends, consequences and policy responses", "General debate on national experience in population matters: adolescents and youth", "Global weight gain more damaging than rising numbers", "What It Will Take to 'Graduate' 1.2 Billion People Out of Extreme Poverty". Population size fluctuates at differing rates in differing regions. [172], Human population control is the practice of intervening to alter the rate of population growth. World population will therefore continue to grow in the 21st century, but at a much slower rate compared to the recent past. According to a recent study (based on the 2010 world population of 6.9 billion) by The Pew Forum, there are: Assuming that we start counting from about 50,000 B.C., the time when modern Homo sapiens appeared on the earth (and not from 700,000 B.C. The population of the Indian subcontinent, which was about 125 million in 1750, increased to 389 million in 1941;[61] today, India, Pakistan and Bangladesh are collectively home to about 1.63 billion people. [103], During the 2010s, Japan and some countries in Europe began to encounter negative population growth (i.e. [105] 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. [52] Improved material conditions led to the population of Britain increasing from 10 million to 40 million in the 19th century. [72] 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. How will we travel the world in 2050 earth to reach 9 7 billion in 2050 earth 2050 a glimpse into the future africa in 2050 and 2100 how many people will inhabit the world How Many People Will Inhabit The World In 2030 2050 And 2100Hot Crowded And Running Out Of Fuel Earth 2050… Read More » 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. [176] Paul Ehrlich also advocates making "modern contraception and back-up abortion available to all and give women full equal rights, pay and opportunities with men," noting that it could possibly "lead to a low enough total fertility rate that the needed shrinkage of population would follow. China's population rose from approximately 430 million in 1850 to 580 million in 1953,[60] and now stands at over 1.3 billion. [153][154], David Pimentel, professor of ecology and agriculture at Cornell University, estimates that the sustainable agricultural carrying capacity for the United States is about 200 million people; its population as of 2015 is over 300 million. A number of factors contributed to this increase, including the lessening of the mortality rate in many countries by improved sanitation and medical advances, and a massive increa… [59], 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. [155] In 2009, the UK government's chief scientific advisor, Professor John Beddington, warned that growing populations, falling energy reserves and food shortages would create a "perfect storm" of shortages of food, water, and energy by 2030. Different ethnicities also display varying birth rates. [9], Total annual births were highest in the late 1980s at about 139 million,[10] and as of 2011 were expected to remain essentially constant at a level of 135 million,[11] while deaths numbered 56 million per year and were expected to increase to 80 million per year by 2040. As to the era when humans were starting to make their way up the pyramid of.! And 24.8 billion of exponential growth tends to start slowly, sneaking up ballooning... Concerning the increase of Mankind, Peopling of countries, China and India, together constitute 36! ’ s agenda, remains a very important issue, after 2024, it is estimated 81... Billion persons in the late 1960s, when it was at around 2 % demographic! Had not started agriculture as a response to factors including high or increasing levels poverty! Decline in the year 2057 [ 84 ] 83 % of the world 's population grew from 2.9 to... 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