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The Neolithic demographic transition was a period of rapid population growth following the adoption of agriculture by prehistoric societies (the Neolithic Revolution).It was a demographic transition caused by an abrupt increase in birth rates due to the increased food supply and decreased mobility of farmers compared to foragers.
A consequence of the decline in mortality in Stage Two is an increasingly rapid growth in population growth (a.k.a. "population explosion") as the gap between deaths and births grows wider and wider. Note that this growth is not due to an increase in fertility (or birth rates) but to a decline in deaths.
According to the United States Census Bureau, in 2012 there were 45.6 million people in the US (14.8% of the under-65 population) who were without health insurance. Following the implementation of major ACA provisions in 2013, this figure fell by 18.3 million or 40%, to 27.3 million by 2016 or 8.6% of the under-65 population.
Population growth is the increase in the number of people in a population or dispersed group. Actual global human population growth amounts to around 83 million annually, or 1.1% per year. [ 2 ] The global population has grown from 1 billion in 1800 to 8.1 billion in 2024. [ 3 ]
The steady expansion and rapid population growth of the United States after 1815 contrasted sharply with static European societies. Visitors described the rough, sometimes violent, but mostly optimistic and forward-looking attitude of most Americans.
The Affordable Care Act’s chief aim is to extend coverage to people without health insurance. One of the 2010 law’s primary means to achieve that goal is expanding Medicaid eligibility to more people near the poverty level. But a crucial court ruling in 2012 granted states the power to reject the Medicaid expansion.
The population of the More Developed regions is slated to remain mostly unchanged, at 1.2-1.3 billion for the remainder of the 21st century. All population growth comes from the Less Developed regions. [5] [6] The table below breaks out the UN's future population growth predictions by region [5] [6]
The rapid population growth of Afghanistan is considered a problem when it prevents population stabilization and affects maternal and infant health. [34] [35] Reasons for large families include tradition, religion, the different roles of men and women, and the cultural desire to have several sons. [34] [36]