Do you know ghouls from goblins and ghosts?
1812, from the teachings of English economist Thomas R. Malthus (1766-1835), especially with regard to population increase. As an adjective by 1818. Related: Malthusianism.
A pessimistic viewpoint on population and world resources, based on the doctrines of Thomas Malthus. Malthusianism holds that population tends to increase faster than the supply of food, thus preventing the steady progress of mankind. Malthus advocated premarital chastity, late marriage, and sexual abstinence as partial solutions.