Nature herself in times of great poverty or bad climatic conditions, as well as poor harvest, intervenes to restrict the increase of population of certain countries or races; this, to be sure, by a method as wise as it is ruthless.
Thomas MalthusOn the whole it may be observed, that the specific use of a body of unproductive consumers, is to give encouragement to wealth by maintaining such a balance between produce and consumption as will give the greatest exchangeable value to the results of the national industry.
Thomas MalthusThe main peculiarity which distinguishes man from other animals is the means of his support - the power which he possesses of very greatly increasing these means.
Thomas MalthusThe great and unlooked for discoveries that have taken place of late years have all concurred to lead many men into the opinion that we were touching on a period big with the most important changes.
Thomas Malthus