An interesting study of some of
the trivial traits of manner which may be handicaps in sexual selection
is published by Iva Lowther Peters in the _Pedagogical Seminary_, XXIII,
No. 4, pp. 550-570, Dec., 1916.
[102] It has been suggested that the same goal would be reached if a
young man before marriage would take out a life insurance policy in the
name of his bride. The suggestion has many good points.
[103] The correlation between fecundity and longevity which Karl Pearson
has demonstrated gives longevity another great advantage as a standard
in sexual selection. See _Proc. Royal Soc. London_, Vol. 67, p. 159.
[104] It is objected that if the long-lived marry each other, the
short-lived will also marry each other and thus the race will gain no
more than it loses. The reply to this is that the short-lived will marry
in fewer numbers, as some of them die prematurely; that they will have
fewer children; and that these children in turn will tend to die young.
Thus the short-lived strains will gradually run out, while the
long-lived strains are disseminated.
[105] Hankins, F. H., "The Declining Birth-Rate," _Journal of Heredity_,
V, pp. 36-39, August, 1914.
[106] Smith, Mary Roberts, "Statistics of College and Non-college
Women," Quarterly Pubs.
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