Theories and Principles

Theories and - Theories and Principles Doubling Time is the time required for a population to double if the current growth rate continues To

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Theories and Principles Doubling Time is the time required for a population to double if the current growth rate continues. To calculate the doubling time you simply divide 70 by the current growth rate of the country and that yields the number of years required for the double. Table 5 shows the growth rates and estimated doubling times for selected countries based on 2008 estimates. The world's population should double in 58 years. Liberia on the other hand should double its population in only 23 years. In fact, most of the world's population now lives in the less developed regions of the world and they will double in about 47 years. There are approximately 68 percent of the 6.7 billion peoples of this world who now live in less developed countries (roughly 4.56 billion people). In the year 2055 (the year 2008 + 47 years=2055) there should be 9.12 billion people living in the less developed regions of the world. The more developed regions of the world will not double in any of our lifetimes (it would be the year 2358 according to these data). Zero Population Growth occurs when a population neither shrinks nor expands from year to year. Based on other factors in the demographic equation, including death and migration, you can see various results. To understand why some countries have higher or lower rates, you must first understand some theoretical backgrounds. There are two distinct perspectives that relate to births in a population. Antinatalist is a perspective which opposes childbearing and Pronatalist is a perspective which promotes birth and increased population. Antinatalists oppose birth, support contraceptive, abortions, and sterilization along with the education of women. Educating a woman is the most effective way of lowering her fertility. Pronatalists support birth, large families, extended families, and the governmental support of childbearing. Table 5. Growth Rates and Doubling Times for Selected Countries 2008* Country or Region Growth Rate Doubling Time in Years More developed 0.2 350 Less Developed 1.5 47 Africa 2.4 29 Latin America/Caribbean 1.5 47 Asia (Excluding China) 1.5 47 China 0.5 140 Liberia 3.1 23 Canada 0.3 233 Mexico 1.6 44 United States 0.6 116 Italy 0.0 Can't Calculate Japan 0.0 Can't Calculate World 1.2 58 *From 2008 World Population Data Sheet: Demographic Data and Estimates for the Countries and Regions of the World. The US had an antinatalist perspective until then President Ronald Reagan changed the US foreign policy in the 1984 population conference held in Mexico City. President Bill Clinton eventually changed it back to antinatalist. George W. Bush changed it back to pronatalist and President Barack Obama changed it back to antinatalist again. Once a US President chooses the
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nation's perspective, international and local policies come into effect by supporting pro-or antinatalist programs. The first Antinatalist was Thomas Malthus (1766-1834). He was a Reverend and English scholar
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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Theories and - Theories and Principles Doubling Time is the time required for a population to double if the current growth rate continues To

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