Allgemeine Gesellschaftslehre

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Monograph

Identifikator:: 1823562132

URN:: urn:nbn:de:zbw-retromon-217461

Document type:: Monograph

Author:: Sander, Fritz http://d-nb.info/gnd/140473750

Title:: Allgemeine Gesellschaftslehre

Place of publication:: Jena

Publisher:: Verlag von Gustav Fischer

Year of publication:: 1930

Scope:: XVI, 572 Seiten

Digitisation:: 2022

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

Document type:: Monograph

Structure type:: Contents

Collection:: Economics Books

THE OUTLOOK been possible to ascertain it exactly?” For the quinquennium 19o6 to 1911 there: were accurate statistics for twenty-six countries, and these gave a rate over all of 1-159 per cent. per annum. For the century 1800 to 1900, however, there is no doubt that the rate of increase was not even 1 per cent. Roughly it was about only 0-864 per cent.! Thus, although 13 per cent. is approximately the recent annual rate of increase for twenty-six countries, it is only about six- sevenths of a per cent. for the whole world. We get an idea of the significance of these rates by asking in what time the population would double itself, if they held good. It is sufficient to mention that 1 per cent. means doubling in 69-66 years.2 Hence, supposing Man started from a single pair, it has to be doubled only thirty times to give a population of 2,147,483,048, that is more people than the world yet contains. This means that a rate of increase of 1 per cent. would give a population of over 2147 millions in 2090 years. We get also, and very readily, a clear idea of the extraordinary slowness of the average rate of growth of the world’s population by making any plausible assumptions as to the length of time Man has been on the planet. If this was only 100,000 years, and he sprang from one pair only, then his average rate of increase was only about one-fiftieth of a per cent. annually, or 2 per 10,000 per year. If, however, he has been on the earth as much as one million years, his increase-rate was only one five-hundredth of a per cent., instead of about 1 per cent. as at the beginning of this century. In other words, every 1 See Mathematical Theory of Population, Appendix to Report on 1911 Australian Census, G. H. Knibbs, p- 31. i ? The rate 0-864 per cent. doubles the population in 80-54 years; 1-000 per cent. in 69-66 years; and 1-159 per cent. in 60-22 years.

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fullscreen: The shadow of the world's future, or The earth's population possibilities & the consequences of the present rate of increase of the earth's inhabitants

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