3. author of a very interesting book, "The Politicians: thingsof heaven and things of earth" has detailed estimates ofpopulation growth rates calculated by a different method thangiven by the above formula. Long's overall conclusions, includedon his web page, are similar to those presented above.

Zero population growth - Wikipedia

Update: Growth Rate Slowing; Global Population in 2002 Tops6.2 Billion, Reports Census Bureau

The Growth of Germany’s Muslim Population | Pew …

Immigration Reform Must Help Rein-In Population Growth!
With Congress now open to the long-overdue challenge to “fix” America’s broken immigration system it is essential that our nation ends up with workable, common-sense immigration laws.
So it is vital that the end result include reasonable policies that not only severely crack down on illegal immigration but also radically scale back current legal immigration[…]

2018 Essay Scholarship Contest | Negative Population Growth

NPG Cites Historic Opportunity to Rein-in Population Growth. In advance of a major push to decide the fate of illegal young people in the U.S. currently covered by the Deferred Action for Childhood Arrivals program, NPG President Donald Mann has called on Congress to also take this opportunity to make a number of additional “nation changing” reforms to America’s broken immigration system[…]

LR: United Nations, 1992. Long-range World Population Projection:Two Centuries of Population Growth, 1950-2150 (United Nations,New York).

Short Paragraph on "Population Growth"

-- While fertility was the dominant factor underlying national, regional and global population growth during the past 50 years, the large proportion of women in their reproductive years in current national and global populations will account for much of the population change expected to occur over the next 50 years.

With regard to the effects of plagues, wars, and disasterson population growth rates, Ian T. Taylor (Ref. 2.) notes,

518 Words Essay on Population Growth

"...Assume that C = 2 and x = 2, which is equivalent to saying that the average family has 4 children who later have families of their own, and that each set of parents lives to see all their grandchildren. For these conditions which are not at all unreasonable, the population at the end of 5 generation would be 96, after 10 generations, 3,070; after 15 generations, 98,300; after 20 generations, 3,150,000; and after 30 generations, 3,220,000,000. In one more generation (31) the total would increase to 6.5 billion.

"The next obvious question is: How long is a generation? Again, a reasonable assumption is that the average marriage occurs at age 25 and that the four children will have been born by age 35. Then the grandchildren will have been born the parents have lived their allotted span of 70 years. A generation is thus about 35 years. Many consider a generation to be only 30 years. This would mean that the entire present world population could have been produced in approximately 30 x 35, or 1,050 years.

"The fact that it has actually taken considerably longer than this to bring the world population to its present size indicates that the average family is less than 4 children, or that the average life-span is less than 2 generations, or both. For comparison, let us assume then that the average family has only 3 children, and that the life-span is 1 generation (i.e., that C = 1.5 and x = 1). 10 generations the population would be 106 after 20 generations, 6,680; after 30 generations, 386,000; and after 52 generations, 4,340,000,000...At 35 years per generation, this would be only 1,820 years. Evidently even 3 children per family is too many for human history as a whole."

It refers to the process of cultural exchanges as a result of continuous firsthand contact among cultural groups.

Poverty is a result of population growth - Discuss

The main weakness in the models comes from migration. As theauthors point out, if one region is totally isolated (somethingthat they do not simulate), with no migrants connecting it toother subpopulations, then the universal ancestor must logicallyhave lived before the period of isolation began. Only after thatperiod ends would the dates for the universal ancestor becomeless distant. Because of the effects of isolation, had we beenliving in 1700, say, and tried to work out when our universaland identical ancestors lived, the answers would have been furtherback in time than the answers we obtain now. Tasmania, for instance,was conceivably completely isolated at the time, and probablyhad been for millennia; this would therefore have pushed backthe dates for universal and identical ancestry. So uncertaintiesabout population structure introduce uncertainty into the proposeddates.

WPP63: United Nations, 1966. World Population Prospects asAssessed in 1963 (United Nations, New York).

Population Growth 5 Problem and solution essay

-- "Population aging," the rise in all regions in the size of older age groups relative to younger ones, will be an increasingly significant trend in coming decades. The world's older population is expected to grow considerably. In 2050, there will be more than three times as many people age 65 and older as there are today. In contrast, the number of children is expected to remain relatively stable over the next five decades.