1. "Population, when unchecked, increases in a geometrical ratio, Subsistence, increases only in an arithmetical ratio." (An Essay on the Principle of Population, 1798)
2. "The perpetual tendency of the race of man to increase beyond the means of subsistence is one of the general laws of animated nature, which we can have no reason to expect to change." (An Essay on the Principle of Population, 1798)
3. "The employment of the poor in roads and public works, and a tendency among landlords and persons of property to build, to improve and beautify their grounds, and to employ workmen and menial servants, are the means most within our power and most directly calculated to remedy the evils arising from that disturbance in the balance of produce and consumption." (An Essay on the Principle of Population 2nd Edition, 1836)
(original version from April 2017)