No More Learning

His great theory, now or generally held by the most eminent
political economists, is that the increase of population is
always powerfully checked in old countries by the difficulty
in           the supply of food; that the existing evils of
poverty and low wages are really at bottom caused by this
check, and are brought about by the pressure of population
on the soil, and the continual overstocking of the labor
markets with laborers; and hence that the only way in which
society can escape from poverty, with all its miseries, is
by putting a strong restraint on their natural powers of
multiplication.