WEFOUNDpopulation history of u.s


In demographics , the world population is the total number of humans currently living. The world population was estimated to have reached 7.6 billion as of December 2017. [1] The United Nations estimates it will further increase to 11.8 billion by the year 2100. [2]

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 [23] date to the 17th century: William Petty in 1682 estimated world population at 320 million (modern estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent with modern estimates). [24] More refined estimates, broken down by continents, were published in the first half of the 19th century, at 600 to 1000 million in the early 1800s and at 800 to 1000 million in the 1840s. [25]

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. [26] [27] 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 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. [28]

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Hover over a state to see information. Click on a state for access to that state’s Overpopulation page – news, fact sheets, and more detailed information!

NPG created this interactive U.S. population map to stimulate greater interest in population issues at the state level. It illustrates how population growth effects each state now, and – in many cases – how it will have an even more devastating effect in the future.

In demographics , the world population is the total number of humans currently living. The world population was estimated to have reached 7.6 billion as of December 2017. [1] The United Nations estimates it will further increase to 11.8 billion by the year 2100. [2]

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 [23] date to the 17th century: William Petty in 1682 estimated world population at 320 million (modern estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent with modern estimates). [24] More refined estimates, broken down by continents, were published in the first half of the 19th century, at 600 to 1000 million in the early 1800s and at 800 to 1000 million in the 1840s. [25]

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. [26] [27] 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 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. [28]


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