en
by Vernon L. Kellogg in _Darwinism To-day_, pp. 106-128 (New York,
1908). Darwin's own discussion (_The Descent of Man_) is still very well
worth reading, if the reader is on his guard. The best general treatment
of the theory of sexual selection, especially as it applies to man, is
in chapter XI of Karl Pearson's _Grammar of Science_ (2d ed., London,
1900).

[97] Diffloth, Paul, _Le Fin de L'Enigme_, Paris, 1907.

[98] The best popular yet scientific treatment of the subject we have
seen is _The Dynamic of Manhood_, a book recently written by Luther H.
Gulick for the Young Men's Christian Association (New York, The
Association Press, 1917).

[99] The sympathy which we mentioned as the beginning of the
hypothetical love affair does lead to a partial identity of will, it is
true; but there is often too little in common between the man and woman
to make this identity at all complete. As Karl Pearson points out, it is
almost essential to a successful marriage that two people have sympathy
with each other's aims and a considerable degree of similarity in
habits. If such a bond is lacking, the bond of sympathy aroused by some
trivial circumstance will not be sufficient to keep the marriage from
shipwreck. The occasional altruism of young men who marry inferior girls
because they "feel sorry for them" is not praiseworthy.

[100] Ellis, Havelock, _The Task of Social Hygiene_, pp. 208-209,
Boston, Houghton Mifflin Co., 1912.

[101] G. Stanley Hall (_Adolescence_, II, 113) found the following
points, in order, specified as most admired in the other sex by young
men and women in their teens: eyes, hair, stature and size, feet,
eyebrows, complexion, cheeks, form of head, throat, ears, chin, hands,
neck, nose. The voice was highly specialized and much preferred. The
principal dislikes, in order, were: prominent or deep-set eyes, fullness
of neck, ears that stand out, eyebrows that meet, broad and long feet,
high cheek-bones, light eyes, large nose, small stature, long neck or
teeth, bushy brows, pimples, red hair. 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]