later editions he maintained that vice and misery had checked population,
that the progress of society might have diminished rather than increased
the "evils resulting from the principle of population," and that by "moral
restraint" overpopulation could be prevented. As Cannan has pointed out,
[2] this last suggestion destroyed the force of the argument against
Godwin, who could have replied that in order to make "moral restraint"
universal a socialist State was necessary. In order to avoid the evils of
overpopulation, Malthus advised people not to marry, or, if they did,
to marry late in life and to limit the number of their children by the
exercise of self-restraint. He reprobated all artificial and unnatural
methods of birth control as immoral, and as removing the necessary stimulus
to industry; but he failed to grasp the whole truth that an increase of
population is necessary as a stimulus not only to industry, but also as
essential to man's moral and intellectual progress.

(b) _The Neo-Malthusians_

The Malthusian League accept the theory of their revered teacher, but,
curiously enough, they reject his advice "as being impracticable and
productive of the greatest possible evils to health and morality." [3]
On the contrary, they advise universal early marriage, combined with
artificial birth control. Although their policy is thus in flat
contradiction to the policy of Malthus, there are two things common to
both. Each is based on the same fallacy, and the aim of both is wide of the
mark. Indeed, the Neo-Malthusian, like Malthus, has "a mist of speculation
over his facts, and a vapour of fact over his ideas." [4] Moreover, as will
be shown here, the path of the Malthusian League, although at first glance
an easy way out of many human difficulties, is in reality the broad road
along which a man or a nation travels to destruction; and as guides the
Neo-Malthusians are utterly unsafe, since they argue from (a) false