According to Malthusian doctrine overpopulation is the cause of poverty,
disease, and war: and consequently, unless the growth of population is
artificially restrained, all attempts to remedy social evils are futile.
Malthusians claim that "if only the devastating torrent of children could
be arrested for a few years, it would bring untold relief." They hold that
overpopulation is the root of all social evil, and the truth or falsehood
of that proposition is therefore the basis of all their teaching. Now, when
Malthusians are asked to prove that this their basic proposition is true,
they adopt one of two methods, not of proof, but of evasion. Their first
method of evading the question is by asserting that the truth of their
proposition is self-evident and needs no proof. To that we reply that the
falsity of the proposition can and will be proved. Their second device is
to put up a barrage of facts which merely show that all countries, and
indeed the earth itself, would have been overpopulated long ago if the
increase of population had not been limited by certain factors, ranging
from celibacy and late marriages to famines, diseases, wars, and
infanticide. The truth of these facts is indisputable, but it is
nevertheless a manifest breach of logic to argue from the fact of poverty,
disease, and war having checked an increase of population, that therefore
poverty, disease, and war are due to an increase of population. It would be
as reasonable to argue that, because an unlimited increase of insects
is prevented by birds and by climatic changes, therefore an increase of
insects accounts for the existence of birds, and for variations of climate.
Nor is it of any use for Malthusians to say that overpopulation _might_ be
the cause of poverty. They cannot prove that it _is_ the cause of poverty,
and, as will be shown in the following chapter, more obvious and probable
causes are staring them in the face. For our present purpose it will
suffice if we are able to prove that overpopulation has not occurred in the
past and is unlikely to occur in the future.