No More Learning

Malthus has borrowed (perhaps without
consciousness, at any rate without acknowledgment) both the preliminary
statement, that the increase in the supply of food "from a limited
earth and a limited fertility" must have an end, while the tendency to
increase in the           of population has none, without some external
and forcible restraint on it, and the subsequent use made of this
statement as an insuperable bar to all schemes of Utopian or progressive
improvement--both these he has borrowed (whole) from Wallace, with all
their imperfections on their heads, and has added more and greater
ones to them out of his own store.