Homo Sapien Population Essay

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Six to seven million years ago Homo sapiens oldest common ancestor roamed the earth, specifically in the north-central region on the continent of Africa. This ancestor is known as Sahelanthropus tchadensis (Tattersall). They are accepted to have common lineage due to their terrestrial bipedalism, forward positioned foramen magnum, the broad and flat facial structure, and the smaller canines separating it from the very similar ape family (Tattersall). Unfortunately the genus Homo has not had much luck with their population sizes considering eight out of nine species belonging to it have gone extinct (Tattersall). This may be why Homo sapiens do so well with population growth; evolution of our genus found the problem and solved it but this problem may have been way to overly corrected. …show more content…
Human population has been steadily increasing over time and the rate of this increase has jumped drastically. Over the 200,000 years that humans have been around the population has sky rocketed just in the last 60 years. In 1950 the world population was 2,557,628,654 since then our population has almost tripled (United States Census Bureau). If you think about how long it took us to get to that 2.5 billion and how much we jumped in a small fraction of that time it is easier to fathom our population growth dilemma. There are four main factors that are taking into consideration when accessing population growth expectancy (Pew Research Center). These four changes are fertility rates, life expectancy, initial age profile of population, and migration (Pew Research Center). Fertility is the number of children an average woman is expected to have in their lifetime (Pew Research Center). From 1950 to 2015 the fertility rate has been cut in half from starting at 5 children per lifetime to now only being 2.5 lifetime (Pew Research Center). Declining fertility rates could be good for an over populated

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