1. Reasons for Changes in the UK Population
... rate during 1850-1970 was because less people were dying from infectious diseases such as tuberculosis (TB), typhoid, measles, etc. It has been suggested that this could be a result of natural selection where only the strongest genes survived. On the other hand Thomas McKeown (1972) suggested that it was actually the improved nutrition which contributed to the decline in death rates as ... were more likely to increase rather than decrease death rates in childbirth," reinforcing the fact that the decline in death rates is very likely to be the cause of natural selection. Now in the 20th ...
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- Grade Level: Undergraduate