Economic factors outweigh medical concerns and cultural
influences
The world population could top 8 billion in the year 2023 if
current growth rates remain constant, according to United Nations figures.
However, if global fertility rates slow more quickly than expected, there could
be up to half a billion fewer mouths to feed on Earth in 2023. Based on a
recent study by a University of Missouri anthropologist, economic changes have
the greatest impact on reducing family size, and thus slowing population
growth, compared to other factors. Understanding the causes of declining birth
rates may lead to improved policies designed to influence fertility and result
in reduced competition for food, water, land and wealth.