anner of thinking, into
schools and among the masses, that we shall be able to contend
efficaciously with the routine and parrot-like repetitions which are
rooted in the worship of authoritative doctrines and prejudices based
on the sanctity of what is old.

We have already sufficiently dealt with the superannuated prejudices
and customs to be contended with in the sexual domain, and need not
return to them. The whole of this category of causes of evil, a
category which also plays a great part in all other domains of human
life, can only, therefore, be contended with by true science combined
with an integral and free education of the character of youth.

I must once again insist on the necessity of a fight to a finish on
this ground. It is necessary for this that scientists should from time
to time emerge from their sanctums, and let their lights shine in the
whirlpool of human society. They must take part in social conflicts
and avoid losing touch with what is and always will be human.

The following postulates relate to aberrations and dangers which are
more partial or more local.

=5. Pornography.=--In Chapters V, X and XVIII, I have spoken of
pornography, and in Chapter XVII, of its great danger to the
development of a normal sexual life in youth. Although pornography
owes much of its origin and development to the greed for gain, it must
not be forgotten that, on the other hand, masculine eroticism tends to
promote its mercantile interests. It is the duty of society to oppose
the pornographic products of morbid eroticism, without imposing the
least constraint on true art. The sexual appetite of man is on the
average rather strong; we may even say that it is much too strong,
compared with the social necessities of procreation. It is, therefore,
quite superfluous to artificially stimulate it. The struggle against
pornography must, therefore, be raised to the rank of a postulate.

We must not forget, however, that we shall contend with it much more
successfully by fulfilling our first four postulates, and in raising
the artistic ideal and feeling in man, than by direct measures of
suppression. The latter should be limited to the most coarse and
corrupt productions of pornography.

=6. Politics and Sexual Life.=--I need only remind the reader of the
encroachments of politics on sexual life, and especially of the abuse
of sexual influence in the domain of politics. It is needless to point
out the necessity of oppo