In demographics, the world population is the total number of humans currently living.
Modern humans are the only extant members of Hominina clade, a branch of the taxonomical tribe Hominini belonging to the family of great apes.
Demography is the statistical study of populations, especially human beings.
World Population by Population Education
The world population was estimated to have reached 7.6 billion as of December 2017.
Time Lapse: World population grows through history by RT
The United Nations estimates it will further increase to 11.8 billion by the year 2100.
The United Nations is an intergovernmental organization to promote international co-operation.
World population has experienced continuous growth since the end of the Great Famine of 1315–17 and the Black Death in 1350, when it was near 370 million.
The Black Death was one of the most devastating pandemics in human history, resulting in the deaths of an estimated 75 to 200 million people in Eurasia and peaking in Europe from 1346 to 1353.
The Great Famine of 1315–1317 was the first of a series of large-scale crises that struck Europe early in the fourteenth century.
The highest population growth rates – global population increases above 1.8% per year – occurred between 1955 and 1975, peaking to 2.06% between 1965 and 1970.
The growth rate has declined to 1.18% between 2010 and 2015 and is projected to decline to 0.13% by the year 2100.
Total annual births were highest in the late 1980s at about 139 million, and are now expected to remain essentially constant at their 2011 level of 135 million, while deaths number 56 million per year and are expected to increase to 80 million per year by 2040.
The median age of the world's population was estimated to be 30.1 years in 2016, with the male median age estimated at 29.4 years and female at 30.9 years.
A population pyramid, also called an "age pyramid" is a graphical illustration that shows the distribution of various age groups in a population, which forms the shape of a pyramid when the population is growing.
The 2012 UN 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.
2003 UN Population Division population projections for the year 2150 range between 3.2 and 24.8 billion.
One of many independent mathematical models supports the lower estimate, while a 2014 estimate forecasts between 9.3 and 12.6 billion in 2100, and continued growth thereafter.
Some analysts have questioned the sustainability of further world population growth, highlighting the growing pressures on the environment, global food supplies, and energy resources.
Estimates of the total number of humans who have ever lived range from 106 to 108 billion.