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Graph of world population over the past 12,000 years . As a general rule, the confidence of estimates on historical world population decreases for the more distant past. Robust population data exist only for the last two or three centuries. Until the late 18th century, few governments had ever performed an accurate census.
[citation needed] United Nations Population Fund spokesman Omar Gharzeddine disputed the date of the Day of Six Billion by stating, "The U.N. marked the '6 billionth' [person] in 1999, and then a couple of years later the Population Division itself reassessed its calculations and said, actually, no, it was in 1998." [12]
Global population gained 50% in the 5th millennium BC, and 100% each millennium until 1000 BC, reaching 50 million people. After the beginning of the Iron Age, growth rate reached its peak with a doubling time of 500 years. However, growth slackened between 500 BC and 1 AD, before ceasing around 200 AD.
This article lists the largest human settlements in the world (by population) over time, as estimated by historians, from 7000 BC when the largest human settlement was a proto-city in the ancient Near East with a population of about 1,000–2,000 people, to the year 2000 when the largest human settlement was Tokyo with 26 million.
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 [10] 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 ...
The oldest known plague victims date back to around 5,000 years ago in Europe. Ancient DNA reveals the role the disease may have played in a mysterious population decline.
The national 1 July, mid-year population estimates (usually based on past national censuses) supplied in these tables are given in thousands. The retrospective figures use the present-day names and world political division: for example, the table gives data for each of the 15 republics of the former Soviet Union, as if they had already been independent in 1950.
Paleontologists are revealing early humans actually co-existed with a human-like species some 300,00 years ago. ... that the new species roamed the earth over 2 million years ago, but now it is ...