the
exercise of responsibility, in trying to get something for nothing, he
is not merely cheating others but himself as well.

In still another field science and scientific method now emphasize the
pivotal importance of Birth Control. The Binet-Simon intelligence tests
which have been developed, expanded, and applied to large groups of
children and adults present positive statistical data concerning the
mental equipment of the type of children brought into the world under
the influence of indiscriminate fecundity and of those fortunate
children who have been brought into the world because they are wanted,
the children of conscious, voluntary procreation, well nourished,
properly clothed, the recipients of all that proper care and love can
accomplish.

In considering the data furnished by these intelligence tests we should
remember several factors that should be taken into consideration.
Irrespective of other considerations, children who are underfed,
undernourished, crowded into badly ventilated and unsanitary homes and
chronically hungry cannot be expected to attain the mental development
of children upon whom every advantage of intelligent and scientific
care is bestowed. Furthermore, public school methods of dealing with
children, the course of studies prescribed, may quite completely fail to
awaken and develop the intelligence.

The statistics indicate at any rate a surprisingly low rate of
intelligence among the classes in which large families and uncontrolled
procreation predominate. Those of the lowest grade in intelligence
are born of unskilled laborers (with the highest birth rate in the
community); the next high among the skilled laborers, and so on to the
families of professional people, among whom it is now admitted that the
birth rate is voluntarily controlled.(3)

But scientific investigations of this type cannot be complete
until statistics are accurately obtained concerning the relation of
unrestrained fecundity and the quality, mental and physical, of the
children produced. The philosophy of Birth Control therefore seeks and
asks the cooperation of science and scientists, not to strengthen its
own "case," but because this sexual factor in the determination of
human history has so long been ignored by historians and scientists.
If science in recent years has contributed enormously to strengthen
the conviction of all intelligent people of the necessity and wisdom
of Birth Control, this philosophy in