Population growth is essential for creating a strong base of high-income workers. It also helps pay for social welfare programs. When birth rates decrease, the strain on younger workers can be immense.Continue Reading
Nations with higher populations are better able to raise money on a national level, and this can lead to more international clout. China, for example, has a relatively low per capita income, but its large population gives it tremendous influence. Its centralized government is able to accomplish feats more developed nations cannot afford.
Many developed nations are facing problems due to declining birth rates. The cost of retirement care for the large population born in the middle of the 20th century is high, and young people are expected to pay for this through taxes. As a result, young people have a higher tax burden than the older generation had while they were working.
When birth rates were high in the middle of the 20th century, many experts predicted that they would continue to accelerate and eventually reach unsustainable levels. However, studies have shown that developed nations have lower birth rates. Developed nations with low immigration, like Japan, actually have declining populations. As the rest of the world develops, experts believe that the Earth's population will plateau.Learn more about Population & Demography
The basic equation for calculating population growth multiplies the population size by the per capita growth rate, which is calculated by subtracting the per capita death rate from the per capita birth rate. This simplistic calculation does not factor in the effects of migration or immigration on a population's size.Full Answer >
Thomas Robert Malthus was an English cleric, scholar and economist who predicted that unchecked population growth would lead to famine and disease. His seminal work was titled "An Essay on the Principle of Population as it Affects the Future Improvement of Society, with Remarks on the Speculations of Mr. Godwin, Mr. Condorcet, and Other Writers."Full Answer >
Average annual 20th century population growth peaked in 1987 at approximately 92.3 million people, but the average annual 20th century growth rate peaked in 1967 at 2.11 percent of the previous year's population. Population growth is generally expressed as a percentage, and any precise numerical figure is merely an estimate.Full Answer >
The J curve represents population growth with no restrictions, while the S curve represents population growth with a restricting factor. Exponential and logistical are the two modes of measuring population growth.Full Answer >