Tragedy of the Commons, 1968.
Tragedy of the Commons (1968)
“Only the scum of the population do it”
As quoted in Roughing It http://www.friesian.com/quotes.htm (1872).
Roughing It (1872)
Context: No California gentleman or lady ever abuses or oppresses a Chinaman, under any circumstances, an explanation that seems to be much needed in the east. Only the scum of the population do it; they and their children. They, and, naturally and consistently, the policemen and politicians, likewise, for these are the dust-licking pimps and slaves of the scum, there as well as elsewhere in America.
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Mark Twain 637
American author and humorist 1835–1910Related quotes

“The only possible way of decreasing Negro population is by means of controlling fertility.”
Source: An American Dilemma (1944), p. 170

Source: An Essay on The Principle of Population (First Edition 1798, unrevised), Chapter I, paragraph 18, lines 1-2

The War and Russian Social-Democracy (September 1917), The Lenin Anthology
1910s

Sick-Nursing and Health-Nursing" (1893)
Preface (p. vi).
Growth of Muslim Population in Medieval India (1973)

Interview, November, 1976.[citation needed]
Post-Prime Ministerial

Source: EU referendum: Leaving EU a 'leap in the dark' says Cameron https://www.bbc.co.uk/news/uk-politics-eu-referendum-35634239 BBC News (22 February 2016)