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World population day is an annual event, observed on july 11 every year, which seeks to raise awareness of global population issues [1][2] this followed the first ever world population conference was in geneva from 29 august to 3 september 1927, organized by the league of nations and margaret. The event was established by the governing council of the united nations development programme in 1989

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Estimates of historical world population comparison of humans living today with all previous generations this article lists current estimates of the world population in history Since the establishment of the united nations (un) in 1945, three official international conferences on population have been held (in 1974, 1984 and 1994), and two other conferences on population have been convened (in 1954 and 1965) In summary, estimates for the progression of world population since the late middle ages are in the following ranges:

World population milestones went unnoticed until the 20th century, since there was no reliable data on global population dynamics

[2] the population of the world reached High, medium, and low projections of the future human world population [1] in world demographics, the world population is the total number of humans currently alive It took around 300,000 years of human prehistory and history for the human population to reach a billion and only 218 more years to reach. Demographic history is the reconstructed record of human population in the past

Given the lack of population records prior to the 1950s, there are many gaps in our record of demographic history Historical demographers must make do with estimates, models and extrapolations For the demographic methodology, see historical demography. Historical demography is the quantitative study of human population in the past

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

The day of seven billion, october 31, 2011, is the day that has been officially designated by the united nations population fund (unfpa) as the approximate day on which the total world population reached a population of seven billion people