that it is in the
interest of social progress itself that hard-won liberties must be
restrained by the demonstrable needs of society.

This new and more vigorous development of social control, while
reflecting something of that wholesome fear of public opinion which the
intimacies of a small community maintain, is much more closely allied to
the old communal restraints and mutual protections to which the human
will first yielded. Although this new control is based upon the
voluntary co-operation of self-directed individuals, in contrast to the
forced submission that characterized the older forms of social
restraint, nevertheless in predicting the establishment of adequate
social control over the instinct which the modern novelists so often
describe as "uncontrollable," there is a certain sanction in this old
and well-nigh forgotten history.

The most superficial student of social customs quickly discovers the
practically unlimited extent to which public opinion has always
regulated marriage. If the traditions of one tribe were endogamous, all
the men dutifully married within it; but if the customs of another
decreed that wives must be secured by capture or purchase, all the men
of that tribe fared forth in order to secure their mates. From the
primitive Australian who obtains his wives in exchange for his sisters
or daughters, and never dreams of obtaining them in any other way, to
the sophisticated young Frenchman, who without objection marries the
bride his careful parents select for him; from the ancient Hebrew, who
contentedly married the widow of his deceased brother because it was
according to the law, to the modern Englishman who refused to marry his
deceased wife's sister because the law forbade it, the entire pathway of
the so-called uncontrollable instinct has been gradually confined
between carefully clipped hedges and has steadily led up to a house of
conventional domesticity. Men have fallen in love with their cousins or
declined to fall in love with them, very much as custom declared
marriages between cousins to be desirable or undesirable, as they
formerly married their sisters and later absolutely ceased to desire to
marry them. In fact, regulation of this great primitive instinct goes
back of the human race itself. All the higher tribes of monkeys are
strictly monogamous, and many species of birds are faithful to one mate,
season after season. According to the great authority, Forel,
prostitution nev