erence could be fulfilled. But like other natural
resources, men's original tendencies must be controlled and
redirected, if they are to be fruitfully utilized in the interests
of human welfare.

There are a number of conditions that make imperative the
control of native tendencies. The first of these is intrinsic
to the organization of instincts themselves. Human beings
are born with a plurality of desires, and happiness consists in
an equilibrium of satisfactions. But impulses are stimulated
at random and collide with one another. Often one impulse,
be it that of curiosity or pugnacity or sex, can be indulged
only at the expense or frustration of many others just as natural,
normal, and inevitable. There is a certain school of
philosophical radicals who call us back to Nature, to a life of
unconsidered impulse. They paint the rapturous and passionate
moments in which strong human impulses receive
satisfaction without exhibiting the disease and disorganization
of which these indulgences are so often the direct antecedents.
A life is a long-time enterprise and it contains a diversity
of desires. If all of these are to receive any measure of
fulfillment there must be compromise and adjustment between
them; they must all be subjected to some measure of control.

A second cause for the control of instinct lies in the fact that
people live and have to live together. The close association
which is so characteristic of human life is, as we shall see,
partly attributable to a specific gregarious instinct, partly to
the increasing need for cooeperation which marks the increasing
complexity of civilization. But whatever be its causes,
group association makes it necessary that men regulate their
impulses and actions with reference to one another. Endowed
as human beings are with more or less identical sets of
original native desires, the desires of one cannot be freely
fulfilled without frequently coming into conflict with the
similar desires of others. Compromise and adjustment must be
brought about by some intelligent modification both of action
and desire. The child's curiosity, the acquisitiveness or sex
desire or self-assertiveness of the adult must be checked and
modified in the interests of the group among which the individual
lives. One may take a simple illustration from the
everyday life of a large city. There is, for most individuals,
an intrinsic satisfaction in fast and free movement. But that
desire, exhibited