An essay on the principle of population, or, A view of its past and present effects on human happiness : with an inquiry into our prospects respecting the future removal or mitigation of the evils which it occasions / T.R. Malthus selected and introduced by Donald Winch using the text of the 1803 edition as prepared by Patricia James for the Royal Economic Society, 1990, showing the additions and corrections made in the 1806, 1807, 1817, and 1826 editions.