Biology Religion

[Off Topic:] Total Fertility Rate (TFR)

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The single most important factor in determining future population is the total fertility rate (TFR). The TFR is defined as the average number of babies born to women during their reproductive years. A TFR of 2.1 is considered the replacement rate; once a TFR of a population reaches 2.1 the population will remain stable assuming no immigration or emigration takes place. When the TFR is greater than 2.1 a population will increase and when it is less than 2.1 a population will eventually decrease, although due to the age structure of a population it will take years before a low TFR is translated into lower population. [For the TFRs of all countries, click here and scroll down for the relevant links; in looking at the world’s TFRs, ask yourself how worldview and TFR correlate.]

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