It is evident then that in Paris at the present time
reproductive selection is changing the mental and moral composition of
the population at a rapid rate, which can not be very materially reduced
even if it is found that the death-rate in the poorer districts is
considerably greater than it is on the more fashionable boulevards.
J. Bertillon has brought together[67] in a similar way data from a
number of cities, showing the following birth-rates:
_Berlin_ _Vienna_ _London_
Very poor quarters 157 200 147
Poor quarters 129 164 140
Comfortable quarters 114 155 107
Very comfortable 96 153 107
Rich 63 107 87
Very rich 47 81 63
--- --- ---
Average 102 153 109
Obviously, in all these cases reproductive selection will soon bring
about such a change in the character of the population, that a much
larger part of it than at present will have the hereditary
characteristics of the poorer classes and a much smaller part of it than
at present the hereditary characteristics of the well-to-do classes.
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